diff --git a/examples/allegro5_example/imgui_impl_a5.cpp b/examples/allegro5_example/imgui_impl_a5.cpp
index c7ba1106..f9dade11 100644
--- a/examples/allegro5_example/imgui_impl_a5.cpp
+++ b/examples/allegro5_example/imgui_impl_a5.cpp
@@ -46,8 +46,8 @@ void ImGui_ImplA5_RenderDrawLists(ImDrawData* draw_data)
 
         // FIXME-OPT: Unfortunately Allegro doesn't support 32-bits packed colors so we have to convert them to 4 floats
         static ImVector<ImDrawVertAllegro> vertices;
-        vertices.resize(cmd_list->VtxBuffer.size());
-        for (int i = 0; i < cmd_list->VtxBuffer.size(); ++i)
+        vertices.resize(cmd_list->VtxBuffer.Size);
+        for (int i = 0; i < cmd_list->VtxBuffer.Size; ++i)
         {
             const ImDrawVert &dv = cmd_list->VtxBuffer[i];
             ImDrawVertAllegro v;
@@ -61,12 +61,12 @@ void ImGui_ImplA5_RenderDrawLists(ImDrawData* draw_data)
         // FIXME-OPT: Unfortunately Allegro doesn't support 16-bit indices
         // You can also use '#define ImDrawIdx unsigned int' in imconfig.h and request ImGui to output 32-bit indices
         static ImVector<int> indices;
-        indices.resize(cmd_list->IdxBuffer.size());
-        for (int i = 0; i < cmd_list->IdxBuffer.size(); ++i)
+        indices.resize(cmd_list->IdxBuffer.Size);
+        for (int i = 0; i < cmd_list->IdxBuffer.Size; ++i)
             indices[i] = (int)cmd_list->IdxBuffer.Data[i];
 
         int idx_offset = 0;
-        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.size(); cmd_i++)
+        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
         {
             const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
             if (pcmd->UserCallback)
diff --git a/examples/apple_example/imguiex-ios/imgui_impl_ios.mm b/examples/apple_example/imguiex-ios/imgui_impl_ios.mm
index b286c4d4..394146b0 100644
--- a/examples/apple_example/imguiex-ios/imgui_impl_ios.mm
+++ b/examples/apple_example/imguiex-ios/imgui_impl_ios.mm
@@ -648,7 +648,7 @@ static void ImGui_ImplIOS_RenderDrawLists (ImDrawData *draw_data)
         ImDrawIdx* idx_buffer = &cmd_list->IdxBuffer.front();
         
         glBindBuffer(GL_ARRAY_BUFFER, g_VboHandle);
-        int needed_vtx_size = cmd_list->VtxBuffer.size() * sizeof(ImDrawVert);
+        const int needed_vtx_size = cmd_list->VtxBuffer.Size * sizeof(ImDrawVert);
         if (g_VboSize < needed_vtx_size)
         {
             // Grow our buffer if needed
@@ -659,11 +659,12 @@ static void ImGui_ImplIOS_RenderDrawLists (ImDrawData *draw_data)
         unsigned char* vtx_data = (unsigned char*)glMapBufferRange(GL_ARRAY_BUFFER, 0, needed_vtx_size, GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);
         if (!vtx_data)
             continue;
-        memcpy(vtx_data, &cmd_list->VtxBuffer[0], cmd_list->VtxBuffer.size() * sizeof(ImDrawVert));
+        memcpy(vtx_data, cmd_list->VtxBuffer.Data, cmd_list->VtxBuffer.Size * sizeof(ImDrawVert));
         glUnmapBuffer(GL_ARRAY_BUFFER);
         
-        for (const ImDrawCmd* pcmd = cmd_list->CmdBuffer.begin(); pcmd != cmd_list->CmdBuffer.end(); pcmd++)
+        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
         {
+            const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
             if (pcmd->UserCallback)
             {
                 pcmd->UserCallback(cmd_list, pcmd);
diff --git a/examples/directx10_example/imgui_impl_dx10.cpp b/examples/directx10_example/imgui_impl_dx10.cpp
index bccee87e..e6e45d0c 100644
--- a/examples/directx10_example/imgui_impl_dx10.cpp
+++ b/examples/directx10_example/imgui_impl_dx10.cpp
@@ -87,10 +87,10 @@ void ImGui_ImplDX10_RenderDrawLists(ImDrawData* draw_data)
     for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
         const ImDrawList* cmd_list = draw_data->CmdLists[n];
-        memcpy(vtx_dst, &cmd_list->VtxBuffer[0], cmd_list->VtxBuffer.size() * sizeof(ImDrawVert));
-        memcpy(idx_dst, &cmd_list->IdxBuffer[0], cmd_list->IdxBuffer.size() * sizeof(ImDrawIdx));
-        vtx_dst += cmd_list->VtxBuffer.size();
-        idx_dst += cmd_list->IdxBuffer.size();
+        memcpy(vtx_dst, cmd_list->VtxBuffer.Data, cmd_list->VtxBuffer.Size * sizeof(ImDrawVert));
+        memcpy(idx_dst, cmd_list->IdxBuffer.Data, cmd_list->IdxBuffer.Size * sizeof(ImDrawIdx));
+        vtx_dst += cmd_list->VtxBuffer.Size;
+        idx_dst += cmd_list->IdxBuffer.Size;
     }
     g_pVB->Unmap();
     g_pIB->Unmap();
@@ -189,7 +189,7 @@ void ImGui_ImplDX10_RenderDrawLists(ImDrawData* draw_data)
     for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
         const ImDrawList* cmd_list = draw_data->CmdLists[n];
-        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.size(); cmd_i++)
+        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
         {
             const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
             if (pcmd->UserCallback)
@@ -205,7 +205,7 @@ void ImGui_ImplDX10_RenderDrawLists(ImDrawData* draw_data)
             }
             idx_offset += pcmd->ElemCount;
         }
-        vtx_offset += cmd_list->VtxBuffer.size();
+        vtx_offset += cmd_list->VtxBuffer.Size;
     }
 
     // Restore modified DX state
diff --git a/examples/directx11_example/imgui_impl_dx11.cpp b/examples/directx11_example/imgui_impl_dx11.cpp
index 11f66f0e..6fd75a5c 100644
--- a/examples/directx11_example/imgui_impl_dx11.cpp
+++ b/examples/directx11_example/imgui_impl_dx11.cpp
@@ -89,10 +89,10 @@ void ImGui_ImplDX11_RenderDrawLists(ImDrawData* draw_data)
     for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
         const ImDrawList* cmd_list = draw_data->CmdLists[n];
-        memcpy(vtx_dst, &cmd_list->VtxBuffer[0], cmd_list->VtxBuffer.size() * sizeof(ImDrawVert));
-        memcpy(idx_dst, &cmd_list->IdxBuffer[0], cmd_list->IdxBuffer.size() * sizeof(ImDrawIdx));
-        vtx_dst += cmd_list->VtxBuffer.size();
-        idx_dst += cmd_list->IdxBuffer.size();
+        memcpy(vtx_dst, cmd_list->VtxBuffer.Data, cmd_list->VtxBuffer.Size * sizeof(ImDrawVert));
+        memcpy(idx_dst, cmd_list->IdxBuffer.Data, cmd_list->IdxBuffer.Size * sizeof(ImDrawIdx));
+        vtx_dst += cmd_list->VtxBuffer.Size;
+        idx_dst += cmd_list->IdxBuffer.Size;
     }
     ctx->Unmap(g_pVB, 0);
     ctx->Unmap(g_pIB, 0);
@@ -194,7 +194,7 @@ void ImGui_ImplDX11_RenderDrawLists(ImDrawData* draw_data)
     for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
         const ImDrawList* cmd_list = draw_data->CmdLists[n];
-        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.size(); cmd_i++)
+        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
         {
             const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
             if (pcmd->UserCallback)
@@ -210,7 +210,7 @@ void ImGui_ImplDX11_RenderDrawLists(ImDrawData* draw_data)
             }
             idx_offset += pcmd->ElemCount;
         }
-        vtx_offset += cmd_list->VtxBuffer.size();
+        vtx_offset += cmd_list->VtxBuffer.Size;
     }
 
     // Restore modified DX state
diff --git a/examples/directx9_example/imgui_impl_dx9.cpp b/examples/directx9_example/imgui_impl_dx9.cpp
index bb309a86..b009de75 100644
--- a/examples/directx9_example/imgui_impl_dx9.cpp
+++ b/examples/directx9_example/imgui_impl_dx9.cpp
@@ -73,8 +73,8 @@ void ImGui_ImplDX9_RenderDrawLists(ImDrawData* draw_data)
     for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
         const ImDrawList* cmd_list = draw_data->CmdLists[n];
-        const ImDrawVert* vtx_src = &cmd_list->VtxBuffer[0];
-        for (int i = 0; i < cmd_list->VtxBuffer.size(); i++)
+        const ImDrawVert* vtx_src = cmd_list->VtxBuffer.Data;
+        for (int i = 0; i < cmd_list->VtxBuffer.Size; i++)
         {
             vtx_dst->pos[0] = vtx_src->pos.x;
             vtx_dst->pos[1] = vtx_src->pos.y;
@@ -85,8 +85,8 @@ void ImGui_ImplDX9_RenderDrawLists(ImDrawData* draw_data)
             vtx_dst++;
             vtx_src++;
         }
-        memcpy(idx_dst, &cmd_list->IdxBuffer[0], cmd_list->IdxBuffer.size() * sizeof(ImDrawIdx));
-        idx_dst += cmd_list->IdxBuffer.size();
+        memcpy(idx_dst, cmd_list->IdxBuffer.Data, cmd_list->IdxBuffer.Size * sizeof(ImDrawIdx));
+        idx_dst += cmd_list->IdxBuffer.Size;
     }
     g_pVB->Unlock();
     g_pIB->Unlock();
@@ -138,7 +138,7 @@ void ImGui_ImplDX9_RenderDrawLists(ImDrawData* draw_data)
     for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
         const ImDrawList* cmd_list = draw_data->CmdLists[n];
-        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.size(); cmd_i++)
+        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
         {
             const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
             if (pcmd->UserCallback)
@@ -150,11 +150,11 @@ void ImGui_ImplDX9_RenderDrawLists(ImDrawData* draw_data)
                 const RECT r = { (LONG)pcmd->ClipRect.x, (LONG)pcmd->ClipRect.y, (LONG)pcmd->ClipRect.z, (LONG)pcmd->ClipRect.w };
                 g_pd3dDevice->SetTexture(0, (LPDIRECT3DTEXTURE9)pcmd->TextureId);
                 g_pd3dDevice->SetScissorRect(&r);
-                g_pd3dDevice->DrawIndexedPrimitive(D3DPT_TRIANGLELIST, vtx_offset, 0, (UINT)cmd_list->VtxBuffer.size(), idx_offset, pcmd->ElemCount/3);
+                g_pd3dDevice->DrawIndexedPrimitive(D3DPT_TRIANGLELIST, vtx_offset, 0, (UINT)cmd_list->VtxBuffer.Size, idx_offset, pcmd->ElemCount/3);
             }
             idx_offset += pcmd->ElemCount;
         }
-        vtx_offset += cmd_list->VtxBuffer.size();
+        vtx_offset += cmd_list->VtxBuffer.Size;
     }
 
     // Restore the DX9 state
diff --git a/examples/marmalade_example/imgui_impl_marmalade.cpp b/examples/marmalade_example/imgui_impl_marmalade.cpp
index 12d5dfaa..c1856a00 100644
--- a/examples/marmalade_example/imgui_impl_marmalade.cpp
+++ b/examples/marmalade_example/imgui_impl_marmalade.cpp
@@ -40,9 +40,8 @@ void ImGui_Marmalade_RenderDrawLists(ImDrawData* draw_data)
     for(int n = 0; n < draw_data->CmdListsCount; n++)
     {
         const ImDrawList* cmd_list = draw_data->CmdLists[n];
-        const unsigned char* vtx_buffer = (const unsigned char*)&cmd_list->VtxBuffer.front();
-        const ImDrawIdx* idx_buffer = &cmd_list->IdxBuffer.front();
-        int nVert = cmd_list->VtxBuffer.size();
+        const ImDrawIdx* idx_buffer = cmd_list->IdxBuffer.Data;
+        const int nVert = cmd_list->VtxBuffer.Size;
         CIwFVec2* pVertStream = IW_GX_ALLOC(CIwFVec2, nVert);
         CIwFVec2* pUVStream = IW_GX_ALLOC(CIwFVec2, nVert);
         CIwColour* pColStream = IW_GX_ALLOC(CIwColour, nVert);
@@ -62,12 +61,12 @@ void ImGui_Marmalade_RenderDrawLists(ImDrawData* draw_data)
         IwGxSetColStream(pColStream, nVert);
         IwGxSetNormStream(0);
 
-        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.size(); cmd_i++)
+        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
         {
             const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
             if (pcmd->UserCallback)
             {
-                pcmd->UserCallback(cmd_list,pcmd);
+                pcmd->UserCallback(cmd_list, pcmd);
             }
             else
             {
diff --git a/examples/opengl2_example/imgui_impl_glfw.cpp b/examples/opengl2_example/imgui_impl_glfw.cpp
index 2d1f5c1a..91181f10 100644
--- a/examples/opengl2_example/imgui_impl_glfw.cpp
+++ b/examples/opengl2_example/imgui_impl_glfw.cpp
@@ -73,13 +73,13 @@ void ImGui_ImplGlfw_RenderDrawLists(ImDrawData* draw_data)
     for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
         const ImDrawList* cmd_list = draw_data->CmdLists[n];
-        const unsigned char* vtx_buffer = (const unsigned char*)&cmd_list->VtxBuffer.front();
-        const ImDrawIdx* idx_buffer = &cmd_list->IdxBuffer.front();
-        glVertexPointer(2, GL_FLOAT, sizeof(ImDrawVert), (void*)(vtx_buffer + OFFSETOF(ImDrawVert, pos)));
-        glTexCoordPointer(2, GL_FLOAT, sizeof(ImDrawVert), (void*)(vtx_buffer + OFFSETOF(ImDrawVert, uv)));
-        glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(ImDrawVert), (void*)(vtx_buffer + OFFSETOF(ImDrawVert, col)));
+        const ImDrawVert* vtx_buffer = cmd_list->VtxBuffer.Data;
+        const ImDrawIdx* idx_buffer = cmd_list->IdxBuffer.Data;
+        glVertexPointer(2, GL_FLOAT, sizeof(ImDrawVert), (void*)((char*)vtx_buffer + OFFSETOF(ImDrawVert, pos)));
+        glTexCoordPointer(2, GL_FLOAT, sizeof(ImDrawVert), (void*)((char*)vtx_buffer + OFFSETOF(ImDrawVert, uv)));
+        glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(ImDrawVert), (void*)((char*)vtx_buffer + OFFSETOF(ImDrawVert, col)));
 
-        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.size(); cmd_i++)
+        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
         {
             const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
             if (pcmd->UserCallback)
diff --git a/examples/opengl3_example/imgui_impl_glfw_gl3.cpp b/examples/opengl3_example/imgui_impl_glfw_gl3.cpp
index 0e3a754c..865e13a2 100644
--- a/examples/opengl3_example/imgui_impl_glfw_gl3.cpp
+++ b/examples/opengl3_example/imgui_impl_glfw_gl3.cpp
@@ -89,13 +89,14 @@ void ImGui_ImplGlfwGL3_RenderDrawLists(ImDrawData* draw_data)
         const ImDrawIdx* idx_buffer_offset = 0;
 
         glBindBuffer(GL_ARRAY_BUFFER, g_VboHandle);
-        glBufferData(GL_ARRAY_BUFFER, (GLsizeiptr)cmd_list->VtxBuffer.size() * sizeof(ImDrawVert), (GLvoid*)&cmd_list->VtxBuffer.front(), GL_STREAM_DRAW);
+        glBufferData(GL_ARRAY_BUFFER, (GLsizeiptr)cmd_list->VtxBuffer.Size * sizeof(ImDrawVert), (GLvoid*)cmd_list->VtxBuffer.Data, GL_STREAM_DRAW);
 
         glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_ElementsHandle);
-        glBufferData(GL_ELEMENT_ARRAY_BUFFER, (GLsizeiptr)cmd_list->IdxBuffer.size() * sizeof(ImDrawIdx), (GLvoid*)&cmd_list->IdxBuffer.front(), GL_STREAM_DRAW);
+        glBufferData(GL_ELEMENT_ARRAY_BUFFER, (GLsizeiptr)cmd_list->IdxBuffer.Size * sizeof(ImDrawIdx), (GLvoid*)cmd_list->IdxBuffer.Data, GL_STREAM_DRAW);
 
-        for (const ImDrawCmd* pcmd = cmd_list->CmdBuffer.begin(); pcmd != cmd_list->CmdBuffer.end(); pcmd++)
+        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
         {
+            const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
             if (pcmd->UserCallback)
             {
                 pcmd->UserCallback(cmd_list, pcmd);
diff --git a/examples/sdl_opengl2_example/imgui_impl_sdl.cpp b/examples/sdl_opengl2_example/imgui_impl_sdl.cpp
index 63ed9f44..651a480a 100644
--- a/examples/sdl_opengl2_example/imgui_impl_sdl.cpp
+++ b/examples/sdl_opengl2_example/imgui_impl_sdl.cpp
@@ -62,13 +62,13 @@ void ImGui_ImplSdl_RenderDrawLists(ImDrawData* draw_data)
     for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
         const ImDrawList* cmd_list = draw_data->CmdLists[n];
-        const unsigned char* vtx_buffer = (const unsigned char*)&cmd_list->VtxBuffer.front();
-        const ImDrawIdx* idx_buffer = &cmd_list->IdxBuffer.front();
-        glVertexPointer(2, GL_FLOAT, sizeof(ImDrawVert), (void*)(vtx_buffer + OFFSETOF(ImDrawVert, pos)));
-        glTexCoordPointer(2, GL_FLOAT, sizeof(ImDrawVert), (void*)(vtx_buffer + OFFSETOF(ImDrawVert, uv)));
-        glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(ImDrawVert), (void*)(vtx_buffer + OFFSETOF(ImDrawVert, col)));
+        const ImDrawVert* vtx_buffer = cmd_list->VtxBuffer.Data;
+        const ImDrawIdx* idx_buffer = cmd_list->IdxBuffer.Data;
+        glVertexPointer(2, GL_FLOAT, sizeof(ImDrawVert), (void*)((char*)vtx_buffer + OFFSETOF(ImDrawVert, pos)));
+        glTexCoordPointer(2, GL_FLOAT, sizeof(ImDrawVert), (void*)((char*)vtx_buffer + OFFSETOF(ImDrawVert, uv)));
+        glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(ImDrawVert), (void*)((char*)vtx_buffer + OFFSETOF(ImDrawVert, col)));
 
-        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.size(); cmd_i++)
+        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
         {
             const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
             if (pcmd->UserCallback)
diff --git a/examples/sdl_opengl3_example/imgui_impl_sdl_gl3.cpp b/examples/sdl_opengl3_example/imgui_impl_sdl_gl3.cpp
index 7011875a..a91f15b6 100644
--- a/examples/sdl_opengl3_example/imgui_impl_sdl_gl3.cpp
+++ b/examples/sdl_opengl3_example/imgui_impl_sdl_gl3.cpp
@@ -83,13 +83,14 @@ void ImGui_ImplSdlGL3_RenderDrawLists(ImDrawData* draw_data)
         const ImDrawIdx* idx_buffer_offset = 0;
 
         glBindBuffer(GL_ARRAY_BUFFER, g_VboHandle);
-        glBufferData(GL_ARRAY_BUFFER, (GLsizeiptr)cmd_list->VtxBuffer.size() * sizeof(ImDrawVert), (GLvoid*)&cmd_list->VtxBuffer.front(), GL_STREAM_DRAW);
+        glBufferData(GL_ARRAY_BUFFER, (GLsizeiptr)cmd_list->VtxBuffer.Size * sizeof(ImDrawVert), (GLvoid*)cmd_list->VtxBuffer.Data, GL_STREAM_DRAW);
 
         glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_ElementsHandle);
-        glBufferData(GL_ELEMENT_ARRAY_BUFFER, (GLsizeiptr)cmd_list->IdxBuffer.size() * sizeof(ImDrawIdx), (GLvoid*)&cmd_list->IdxBuffer.front(), GL_STREAM_DRAW);
+        glBufferData(GL_ELEMENT_ARRAY_BUFFER, (GLsizeiptr)cmd_list->IdxBuffer.Size * sizeof(ImDrawIdx), (GLvoid*)cmd_list->IdxBuffer.Data, GL_STREAM_DRAW);
 
-        for (const ImDrawCmd* pcmd = cmd_list->CmdBuffer.begin(); pcmd != cmd_list->CmdBuffer.end(); pcmd++)
+        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
         {
+            const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
             if (pcmd->UserCallback)
             {
                 pcmd->UserCallback(cmd_list, pcmd);
diff --git a/examples/vulkan_example/imgui_impl_glfw_vulkan.cpp b/examples/vulkan_example/imgui_impl_glfw_vulkan.cpp
index 2a85ceff..55260044 100644
--- a/examples/vulkan_example/imgui_impl_glfw_vulkan.cpp
+++ b/examples/vulkan_example/imgui_impl_glfw_vulkan.cpp
@@ -315,10 +315,10 @@ void ImGui_ImplGlfwVulkan_RenderDrawLists(ImDrawData* draw_data)
         for (int n = 0; n < draw_data->CmdListsCount; n++)
         {
             const ImDrawList* cmd_list = draw_data->CmdLists[n];
-            memcpy(vtx_dst, &cmd_list->VtxBuffer[0], cmd_list->VtxBuffer.size() * sizeof(ImDrawVert));
-            memcpy(idx_dst, &cmd_list->IdxBuffer[0], cmd_list->IdxBuffer.size() * sizeof(ImDrawIdx));
-            vtx_dst += cmd_list->VtxBuffer.size();
-            idx_dst += cmd_list->IdxBuffer.size();
+            memcpy(vtx_dst, cmd_list->VtxBuffer.Data, cmd_list->VtxBuffer.Size * sizeof(ImDrawVert));
+            memcpy(idx_dst, cmd_list->IdxBuffer.Data, cmd_list->IdxBuffer.Size * sizeof(ImDrawIdx));
+            vtx_dst += cmd_list->VtxBuffer.Size;
+            idx_dst += cmd_list->IdxBuffer.Size;
         }
         VkMappedMemoryRange range[2] = {};
         range[0].sType = VK_STRUCTURE_TYPE_MAPPED_MEMORY_RANGE;
@@ -378,7 +378,7 @@ void ImGui_ImplGlfwVulkan_RenderDrawLists(ImDrawData* draw_data)
     for (int n = 0; n < draw_data->CmdListsCount; n++)
     {
         const ImDrawList* cmd_list = draw_data->CmdLists[n];
-        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.size(); cmd_i++)
+        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
         {
             const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
             if (pcmd->UserCallback)
@@ -397,7 +397,7 @@ void ImGui_ImplGlfwVulkan_RenderDrawLists(ImDrawData* draw_data)
             }
             idx_offset += pcmd->ElemCount;
         }
-        vtx_offset += cmd_list->VtxBuffer.size();
+        vtx_offset += cmd_list->VtxBuffer.Size;
     }
 }