Backends: Win32: viewports created by backend direct messages to DefWindowProcW() in order to support Unicode text inputs. (#9099, #3653, #5961)

Author: ulhc

backends/imgui_impl_win32.cpp

@@ -1372,7 +1372,7 @@ static LRESULT CALLBACK ImGui_ImplWin32_WndProcHandler_PlatformWindow(HWND hWnd,
     // Allow secondary viewport WndProc to be called regardless of current context
     ImGuiContext* ctx = (ImGuiContext*)::GetPropA(hWnd, "IMGUI_CONTEXT");
     if (ctx == NULL)
-        return DefWindowProc(hWnd, msg, wParam, lParam); // unlike ImGui_ImplWin32_WndProcHandler() we are called directly by Windows, we can't just return 0.
+        return ::DefWindowProcW(hWnd, msg, wParam, lParam); // unlike ImGui_ImplWin32_WndProcHandler() we are called directly by Windows, we can't just return 0.
 
     ImGuiIO& io = ImGui::GetIO(ctx);
     ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO(ctx);
@@ -1407,7 +1407,7 @@ static LRESULT CALLBACK ImGui_ImplWin32_WndProcHandler_PlatformWindow(HWND hWnd,
         }
     }
     if (result == 0)
-        result = DefWindowProc(hWnd, msg, wParam, lParam);
+        result = ::DefWindowProcW(hWnd, msg, wParam, lParam);
     return result;
 }
 

docs/CHANGELOG.txt

@@ -58,6 +58,12 @@ Other Changes:
     selects `VkSwapchainCreateInfoKHR`'s `compositeAlpha` value based on
     `cap.supportedCompositeAlpha`. (#8784) [@FelixStach]
 
+Docking+Viewports Branch:
+
+- Backends:
+  - Win32: viewports created by backend forcefully direct messages to
+    DefWindowProcW() in order to support Unicode text input. (#9099, #3653, #5961) [@ulhc]
+
 
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  VERSION 1.92.5 (Released 2025-11-20)