更改mfc应用程序的标题栏颜色

// 在主框架类的InitInstance函数中添加以下代码
BOOL CMyApp::InitInstance()
{
   // ...

   // 注册新的窗口类
   WNDCLASS wndClass;
   wndClass.style = CS_DBLCLKS | CS_HREDRAW | CS_VREDRAW;
   wndClass.lpfnWndProc = ::DefWindowProc;
   wndClass.cbClsExtra = wndClass.cbWndExtra = 0;
   wndClass.hInstance = AfxGetInstanceHandle();
   wndClass.hIcon = LoadIcon(IDR_MAINFRAME);
   wndClass.hCursor = LoadCursor(IDC_ARROW);
   wndClass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
   wndClass.lpszMenuName = NULL;
   wndClass.lpszClassName = _T("MyCustomWndClass");

   AfxRegisterClass(&wndClass);

   // 创建自定义窗口类
   CMyCustomWnd myWnd;
   myWnd.CreateEx(WS_EX_APPWINDOW, _T("MyCustomWndClass"), _T("My App"), WS_OVERLAPPEDWINDOW,
      CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL);

   // ...

   return TRUE;
}

// 自定义窗口类的头文件
class CMyCustomWnd : public CWnd
{
public:
   afx_msg void OnNcPaint();

   DECLARE_MESSAGE_MAP()
};

// 自定义窗口类的实现文件
BEGIN_MESSAGE_MAP(CMyCustomWnd, CWnd)
   ON_WM_NCPAINT()
END_MESSAGE_MAP()

void CMyCustomWnd::OnNcPaint()
{
   // 获取设备上下文
   CDC* pDC = GetWindowDC();

   // 绘制标题栏的背景色
   CRect rect;
   GetWindowRect(&rect);
   rect.bottom = rect.top + GetSystemMetrics(SM_CYCAPTION);
   pDC->FillSolidRect(&rect, RGB(255, 0, 0)); // 使用红色作为标题栏的背景色

   // 调用默认的绘制函数
   Default();

   // 释放设备上下文
   ReleaseDC(pDC);
}