diff --git a/examples/imgui_impl_dx10.cpp b/examples/imgui_impl_dx10.cpp
index fd41922..980f334 100644
--- a/examples/imgui_impl_dx10.cpp
+++ b/examples/imgui_impl_dx10.cpp
@@ -566,7 +566,7 @@
     viewport->RendererUserData = NULL;
 }
 
-static void ImGui_ImplDX10_ResizeViewport(ImGuiViewport* viewport, int w, int h)
+static void ImGui_ImplDX10_ResizeViewport(ImGuiViewport* viewport, ImVec2 size)
 {
     ImGuiPlatformDataDx10* data = (ImGuiPlatformDataDx10*)viewport->RendererUserData;
     if (data->RTView)
@@ -577,7 +577,7 @@
     if (data->SwapChain)
     {
         ID3D10Texture2D* pBackBuffer = NULL;
-        data->SwapChain->ResizeBuffers(0, w, h, DXGI_FORMAT_UNKNOWN, 0);
+        data->SwapChain->ResizeBuffers(0, (UINT)size.x, (UINT)size.y, DXGI_FORMAT_UNKNOWN, 0);
         data->SwapChain->GetBuffer(0, IID_PPV_ARGS(&pBackBuffer));
         g_pd3dDevice->CreateRenderTargetView(pBackBuffer, NULL, &data->RTView);
         pBackBuffer->Release();

diff --git a/examples/imgui_impl_dx10.cpp b/examples/imgui_impl_dx10.cpp
index fd41922..980f334 100644
--- a/examples/imgui_impl_dx10.cpp
+++ b/examples/imgui_impl_dx10.cpp
@@ -566,7 +566,7 @@
     viewport->RendererUserData = NULL;
 }
 
-static void ImGui_ImplDX10_ResizeViewport(ImGuiViewport* viewport, int w, int h)
+static void ImGui_ImplDX10_ResizeViewport(ImGuiViewport* viewport, ImVec2 size)
 {
     ImGuiPlatformDataDx10* data = (ImGuiPlatformDataDx10*)viewport->RendererUserData;
     if (data->RTView)
@@ -577,7 +577,7 @@
     if (data->SwapChain)
     {
         ID3D10Texture2D* pBackBuffer = NULL;
-        data->SwapChain->ResizeBuffers(0, w, h, DXGI_FORMAT_UNKNOWN, 0);
+        data->SwapChain->ResizeBuffers(0, (UINT)size.x, (UINT)size.y, DXGI_FORMAT_UNKNOWN, 0);
         data->SwapChain->GetBuffer(0, IID_PPV_ARGS(&pBackBuffer));
         g_pd3dDevice->CreateRenderTargetView(pBackBuffer, NULL, &data->RTView);
         pBackBuffer->Release();
diff --git a/examples/imgui_impl_dx11.cpp b/examples/imgui_impl_dx11.cpp
index 42aed69..719025a 100644
--- a/examples/imgui_impl_dx11.cpp
+++ b/examples/imgui_impl_dx11.cpp
@@ -574,7 +574,7 @@
     viewport->RendererUserData = NULL;
 }
 
-static void ImGui_ImplDX11_ResizeViewport(ImGuiViewport* viewport, int w, int h)
+static void ImGui_ImplDX11_ResizeViewport(ImGuiViewport* viewport, ImVec2 size)
 {
     ImGuiPlatformDataDx11* data = (ImGuiPlatformDataDx11*)viewport->RendererUserData;
     if (data->RTView)
@@ -585,7 +585,7 @@
     if (data->SwapChain)
     {
         ID3D11Texture2D* pBackBuffer = NULL;
-        data->SwapChain->ResizeBuffers(0, w, h, DXGI_FORMAT_UNKNOWN, 0);
+        data->SwapChain->ResizeBuffers(0, (UINT)size.x, (UINT)size.y, DXGI_FORMAT_UNKNOWN, 0);
         data->SwapChain->GetBuffer(0, IID_PPV_ARGS(&pBackBuffer));
         g_pd3dDevice->CreateRenderTargetView(pBackBuffer, NULL, &data->RTView);
         pBackBuffer->Release();

diff --git a/examples/imgui_impl_dx10.cpp b/examples/imgui_impl_dx10.cpp
index fd41922..980f334 100644
--- a/examples/imgui_impl_dx10.cpp
+++ b/examples/imgui_impl_dx10.cpp
@@ -566,7 +566,7 @@
     viewport->RendererUserData = NULL;
 }
 
-static void ImGui_ImplDX10_ResizeViewport(ImGuiViewport* viewport, int w, int h)
+static void ImGui_ImplDX10_ResizeViewport(ImGuiViewport* viewport, ImVec2 size)
 {
     ImGuiPlatformDataDx10* data = (ImGuiPlatformDataDx10*)viewport->RendererUserData;
     if (data->RTView)
@@ -577,7 +577,7 @@
     if (data->SwapChain)
     {
         ID3D10Texture2D* pBackBuffer = NULL;
-        data->SwapChain->ResizeBuffers(0, w, h, DXGI_FORMAT_UNKNOWN, 0);
+        data->SwapChain->ResizeBuffers(0, (UINT)size.x, (UINT)size.y, DXGI_FORMAT_UNKNOWN, 0);
         data->SwapChain->GetBuffer(0, IID_PPV_ARGS(&pBackBuffer));
         g_pd3dDevice->CreateRenderTargetView(pBackBuffer, NULL, &data->RTView);
         pBackBuffer->Release();
diff --git a/examples/imgui_impl_dx11.cpp b/examples/imgui_impl_dx11.cpp
index 42aed69..719025a 100644
--- a/examples/imgui_impl_dx11.cpp
+++ b/examples/imgui_impl_dx11.cpp
@@ -574,7 +574,7 @@
     viewport->RendererUserData = NULL;
 }
 
-static void ImGui_ImplDX11_ResizeViewport(ImGuiViewport* viewport, int w, int h)
+static void ImGui_ImplDX11_ResizeViewport(ImGuiViewport* viewport, ImVec2 size)
 {
     ImGuiPlatformDataDx11* data = (ImGuiPlatformDataDx11*)viewport->RendererUserData;
     if (data->RTView)
@@ -585,7 +585,7 @@
     if (data->SwapChain)
     {
         ID3D11Texture2D* pBackBuffer = NULL;
-        data->SwapChain->ResizeBuffers(0, w, h, DXGI_FORMAT_UNKNOWN, 0);
+        data->SwapChain->ResizeBuffers(0, (UINT)size.x, (UINT)size.y, DXGI_FORMAT_UNKNOWN, 0);
         data->SwapChain->GetBuffer(0, IID_PPV_ARGS(&pBackBuffer));
         g_pd3dDevice->CreateRenderTargetView(pBackBuffer, NULL, &data->RTView);
         pBackBuffer->Release();
diff --git a/examples/imgui_impl_vulkan.cpp b/examples/imgui_impl_vulkan.cpp
index a013e38..839d737 100644
--- a/examples/imgui_impl_vulkan.cpp
+++ b/examples/imgui_impl_vulkan.cpp
@@ -1055,13 +1055,12 @@
     viewport->RendererUserData = NULL;
 }
 
-static void ImGui_ImplVulkan_ResizeViewport(ImGuiViewport* viewport, int w, int h)
+static void ImGui_ImplVulkan_ResizeViewport(ImGuiViewport* viewport, ImVec2 size)
 {
     ImGuiPlatformDataVulkan* data = (ImGuiPlatformDataVulkan*)viewport->RendererUserData;
     //...
     (void)data;
-    (void)w;
-    (void)h;
+    (void)size;
 }
 
 static void ImGui_ImplVulkan_RenderViewport(ImGuiViewport* viewport)

diff --git a/examples/imgui_impl_dx10.cpp b/examples/imgui_impl_dx10.cpp
index fd41922..980f334 100644
--- a/examples/imgui_impl_dx10.cpp
+++ b/examples/imgui_impl_dx10.cpp
@@ -566,7 +566,7 @@
     viewport->RendererUserData = NULL;
 }
 
-static void ImGui_ImplDX10_ResizeViewport(ImGuiViewport* viewport, int w, int h)
+static void ImGui_ImplDX10_ResizeViewport(ImGuiViewport* viewport, ImVec2 size)
 {
     ImGuiPlatformDataDx10* data = (ImGuiPlatformDataDx10*)viewport->RendererUserData;
     if (data->RTView)
@@ -577,7 +577,7 @@
     if (data->SwapChain)
     {
         ID3D10Texture2D* pBackBuffer = NULL;
-        data->SwapChain->ResizeBuffers(0, w, h, DXGI_FORMAT_UNKNOWN, 0);
+        data->SwapChain->ResizeBuffers(0, (UINT)size.x, (UINT)size.y, DXGI_FORMAT_UNKNOWN, 0);
         data->SwapChain->GetBuffer(0, IID_PPV_ARGS(&pBackBuffer));
         g_pd3dDevice->CreateRenderTargetView(pBackBuffer, NULL, &data->RTView);
         pBackBuffer->Release();
diff --git a/examples/imgui_impl_dx11.cpp b/examples/imgui_impl_dx11.cpp
index 42aed69..719025a 100644
--- a/examples/imgui_impl_dx11.cpp
+++ b/examples/imgui_impl_dx11.cpp
@@ -574,7 +574,7 @@
     viewport->RendererUserData = NULL;
 }
 
-static void ImGui_ImplDX11_ResizeViewport(ImGuiViewport* viewport, int w, int h)
+static void ImGui_ImplDX11_ResizeViewport(ImGuiViewport* viewport, ImVec2 size)
 {
     ImGuiPlatformDataDx11* data = (ImGuiPlatformDataDx11*)viewport->RendererUserData;
     if (data->RTView)
@@ -585,7 +585,7 @@
     if (data->SwapChain)
     {
         ID3D11Texture2D* pBackBuffer = NULL;
-        data->SwapChain->ResizeBuffers(0, w, h, DXGI_FORMAT_UNKNOWN, 0);
+        data->SwapChain->ResizeBuffers(0, (UINT)size.x, (UINT)size.y, DXGI_FORMAT_UNKNOWN, 0);
         data->SwapChain->GetBuffer(0, IID_PPV_ARGS(&pBackBuffer));
         g_pd3dDevice->CreateRenderTargetView(pBackBuffer, NULL, &data->RTView);
         pBackBuffer->Release();
diff --git a/examples/imgui_impl_vulkan.cpp b/examples/imgui_impl_vulkan.cpp
index a013e38..839d737 100644
--- a/examples/imgui_impl_vulkan.cpp
+++ b/examples/imgui_impl_vulkan.cpp
@@ -1055,13 +1055,12 @@
     viewport->RendererUserData = NULL;
 }
 
-static void ImGui_ImplVulkan_ResizeViewport(ImGuiViewport* viewport, int w, int h)
+static void ImGui_ImplVulkan_ResizeViewport(ImGuiViewport* viewport, ImVec2 size)
 {
     ImGuiPlatformDataVulkan* data = (ImGuiPlatformDataVulkan*)viewport->RendererUserData;
     //...
     (void)data;
-    (void)w;
-    (void)h;
+    (void)size;
 }
 
 static void ImGui_ImplVulkan_RenderViewport(ImGuiViewport* viewport)
diff --git a/examples/imgui_impl_win32.cpp b/examples/imgui_impl_win32.cpp
index 1c82cb7..c02bfad 100644
--- a/examples/imgui_impl_win32.cpp
+++ b/examples/imgui_impl_win32.cpp
@@ -418,7 +418,7 @@
             if (!data->ExternalResize)
                 viewport->PlatformRequestResize = true;
             if (io.RendererInterface.ResizeViewport)
-                io.RendererInterface.ResizeViewport(viewport, (int)LOWORD(lParam), (int)HIWORD(lParam));
+                io.RendererInterface.ResizeViewport(viewport, ImVec2((float)LOWORD(lParam), (float)HIWORD(lParam)));
             break;
         }
     }

diff --git a/examples/imgui_impl_dx10.cpp b/examples/imgui_impl_dx10.cpp
index fd41922..980f334 100644
--- a/examples/imgui_impl_dx10.cpp
+++ b/examples/imgui_impl_dx10.cpp
@@ -566,7 +566,7 @@
     viewport->RendererUserData = NULL;
 }
 
-static void ImGui_ImplDX10_ResizeViewport(ImGuiViewport* viewport, int w, int h)
+static void ImGui_ImplDX10_ResizeViewport(ImGuiViewport* viewport, ImVec2 size)
 {
     ImGuiPlatformDataDx10* data = (ImGuiPlatformDataDx10*)viewport->RendererUserData;
     if (data->RTView)
@@ -577,7 +577,7 @@
     if (data->SwapChain)
     {
         ID3D10Texture2D* pBackBuffer = NULL;
-        data->SwapChain->ResizeBuffers(0, w, h, DXGI_FORMAT_UNKNOWN, 0);
+        data->SwapChain->ResizeBuffers(0, (UINT)size.x, (UINT)size.y, DXGI_FORMAT_UNKNOWN, 0);
         data->SwapChain->GetBuffer(0, IID_PPV_ARGS(&pBackBuffer));
         g_pd3dDevice->CreateRenderTargetView(pBackBuffer, NULL, &data->RTView);
         pBackBuffer->Release();
diff --git a/examples/imgui_impl_dx11.cpp b/examples/imgui_impl_dx11.cpp
index 42aed69..719025a 100644
--- a/examples/imgui_impl_dx11.cpp
+++ b/examples/imgui_impl_dx11.cpp
@@ -574,7 +574,7 @@
     viewport->RendererUserData = NULL;
 }
 
-static void ImGui_ImplDX11_ResizeViewport(ImGuiViewport* viewport, int w, int h)
+static void ImGui_ImplDX11_ResizeViewport(ImGuiViewport* viewport, ImVec2 size)
 {
     ImGuiPlatformDataDx11* data = (ImGuiPlatformDataDx11*)viewport->RendererUserData;
     if (data->RTView)
@@ -585,7 +585,7 @@
     if (data->SwapChain)
     {
         ID3D11Texture2D* pBackBuffer = NULL;
-        data->SwapChain->ResizeBuffers(0, w, h, DXGI_FORMAT_UNKNOWN, 0);
+        data->SwapChain->ResizeBuffers(0, (UINT)size.x, (UINT)size.y, DXGI_FORMAT_UNKNOWN, 0);
         data->SwapChain->GetBuffer(0, IID_PPV_ARGS(&pBackBuffer));
         g_pd3dDevice->CreateRenderTargetView(pBackBuffer, NULL, &data->RTView);
         pBackBuffer->Release();
diff --git a/examples/imgui_impl_vulkan.cpp b/examples/imgui_impl_vulkan.cpp
index a013e38..839d737 100644
--- a/examples/imgui_impl_vulkan.cpp
+++ b/examples/imgui_impl_vulkan.cpp
@@ -1055,13 +1055,12 @@
     viewport->RendererUserData = NULL;
 }
 
-static void ImGui_ImplVulkan_ResizeViewport(ImGuiViewport* viewport, int w, int h)
+static void ImGui_ImplVulkan_ResizeViewport(ImGuiViewport* viewport, ImVec2 size)
 {
     ImGuiPlatformDataVulkan* data = (ImGuiPlatformDataVulkan*)viewport->RendererUserData;
     //...
     (void)data;
-    (void)w;
-    (void)h;
+    (void)size;
 }
 
 static void ImGui_ImplVulkan_RenderViewport(ImGuiViewport* viewport)
diff --git a/examples/imgui_impl_win32.cpp b/examples/imgui_impl_win32.cpp
index 1c82cb7..c02bfad 100644
--- a/examples/imgui_impl_win32.cpp
+++ b/examples/imgui_impl_win32.cpp
@@ -418,7 +418,7 @@
             if (!data->ExternalResize)
                 viewport->PlatformRequestResize = true;
             if (io.RendererInterface.ResizeViewport)
-                io.RendererInterface.ResizeViewport(viewport, (int)LOWORD(lParam), (int)HIWORD(lParam));
+                io.RendererInterface.ResizeViewport(viewport, ImVec2((float)LOWORD(lParam), (float)HIWORD(lParam)));
             break;
         }
     }
diff --git a/imgui.h b/imgui.h
index a31a7b1..cff3325 100644
--- a/imgui.h
+++ b/imgui.h
@@ -973,7 +973,7 @@
 {
     void    (*CreateViewport)(ImGuiViewport* viewport);
     void    (*DestroyViewport)(ImGuiViewport* viewport);
-    void    (*ResizeViewport)(ImGuiViewport* viewport, int w, int h);
+    void    (*ResizeViewport)(ImGuiViewport* viewport, ImVec2 size);
     void    (*RenderViewport)(ImGuiViewport* viewport);     // Setup render output, clear targets, call Renderer_RenderDrawData
     void    (*SwapBuffers)(ImGuiViewport* viewport);        // Call Present/SwapBuffers
 };