wined3d: Add UnregisterClass() on DLL_PROCESS_DETACH.

dlls/wined3d/directx.c

@@ -268,7 +268,7 @@ static BOOL WineD3D_CreateFakeGLContext(void) {
         wined3d_fake_gl_context_foreign = FALSE;
 
         /* We need a fake window as a hdc retrieved using GetDC(0) can't be used for much GL purposes */
-        wined3d_fake_gl_context_hwnd = CreateWindowA("WineD3D_OpenGL", "WineD3D fake window", WS_OVERLAPPEDWINDOW,        10, 10, 10, 10, NULL, NULL, NULL, NULL);
+        wined3d_fake_gl_context_hwnd = CreateWindowA(WINED3D_OPENGL_WINDOW_CLASS_NAME, "WineD3D fake window", WS_OVERLAPPEDWINDOW, 10, 10, 10, 10, NULL, NULL, NULL, NULL);
         if(!wined3d_fake_gl_context_hwnd) {
             ERR("HWND creation failed!\n");
             goto fail;

dlls/wined3d/wined3d_main.c

@@ -117,9 +117,9 @@ static BOOL wined3d_init(HINSTANCE hInstDLL)
     wc.hCursor              = LoadCursorA(NULL, (LPCSTR)IDC_ARROW);
     wc.hbrBackground        = NULL;
     wc.lpszMenuName         = NULL;
-    wc.lpszClassName        = "WineD3D_OpenGL";
+    wc.lpszClassName        = WINED3D_OPENGL_WINDOW_CLASS_NAME;
 
-    if (!RegisterClassA(&wc) && GetLastError() != ERROR_CLASS_ALREADY_EXISTS)
+    if (!RegisterClassA(&wc))
     {
         ERR("Failed to register window class 'WineD3D_OpenGL'!\n");
         return FALSE;
@@ -320,9 +320,10 @@ static BOOL wined3d_init(HINSTANCE hInstDLL)
     return TRUE;
 }
 
-static BOOL wined3d_destroy(void)
+static BOOL wined3d_destroy(HINSTANCE hInstDLL)
 {
     HeapFree(GetProcessHeap(), 0, wined3d_settings.logo);
+    UnregisterClassA(WINED3D_OPENGL_WINDOW_CLASS_NAME, hInstDLL);
 
     return TRUE;
 }
@@ -338,7 +339,7 @@ BOOL WINAPI DllMain(HINSTANCE hInstDLL, DWORD fdwReason, LPVOID lpv)
             return wined3d_init(hInstDLL);
 
         case DLL_PROCESS_DETACH:
-            return wined3d_destroy();
+            return wined3d_destroy(hInstDLL);
 
         default:
             return TRUE;

dlls/wined3d/wined3d_private.h

@@ -2818,4 +2818,8 @@ static inline BOOL use_ps(IWineD3DStateBlockImpl *stateblock)
 
 void stretch_rect_fbo(IWineD3DDevice *iface, IWineD3DSurface *src_surface, WINED3DRECT *src_rect,
         IWineD3DSurface *dst_surface, WINED3DRECT *dst_rect, const WINED3DTEXTUREFILTERTYPE filter, BOOL flip);
+
+/* The WNDCLASS-Name for the fake window which we use to retrieve the GL capabilities */
+#define WINED3D_OPENGL_WINDOW_CLASS_NAME "WineD3D_OpenGL"
+
 #endif