Flashing a window

最新推荐文章于 2022-02-16 13:35:36 发布

原创最新推荐文章于 2022-02-16 13:35:36 发布 · 854 阅读

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本文提供了一个使用 Windows API 实现窗口闪烁效果的示例代码。通过创建一个简单的应用程序，演示了如何利用 FlashWindow 和 FlashWindowEx 函数使按钮所在的窗口产生闪烁效果。

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#include <windows.h>

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);


int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
                    PWSTR lpCmdLine, int nCmdShow)
{
  MSG  msg;    
  WNDCLASSW wc = {0};
  wc.lpszClassName = L"Flash";
  wc.hInstance     = hInstance;
  wc.hbrBackground = GetSysColorBrush(COLOR_3DFACE);
  wc.lpfnWndProc   = WndProc;
  wc.hCursor       = LoadCursor(0,IDC_ARROW);

  RegisterClassW(&wc);
  CreateWindowW(wc.lpszClassName, L"Flash",
               WS_OVERLAPPEDWINDOW | WS_VISIBLE,
               100, 100, 250, 180, 0, 0, hInstance, 0);

  while( GetMessage(&msg, NULL, 0, 0)) {
    TranslateMessage(&msg);
    DispatchMessage(&msg);
  }

  return (int) msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT msg,
    WPARAM wParam, LPARAM lParam )
{
  FLASHWINFO fwi;

  switch(msg)  
  {
      case WM_CREATE:

          CreateWindowW(L"Button", L"Flash",
                  WS_CHILD | WS_VISIBLE,
                  10, 10, 80, 25, 
                  hwnd, (HMENU) 1, NULL, NULL);
          break;

      case WM_COMMAND:

          fwi.cbSize = sizeof(fwi);
          fwi.dwFlags = FLASHW_ALL;
          fwi.dwTimeout = 0;
          fwi.hwnd = hwnd;
          fwi.uCount = 4;

          FlashWindowEx(&fwi);
          break;

      case WM_DESTROY:

          PostQuitMessage(0);
          break; 
  }

  return DefWindowProcW(hwnd, msg, wParam, lParam);
}