SendMessage 是 API 函数 吧都是些 定义 的 常数&H 不是 16进制数CWindow::SendMessageLRESULT SendMessage( UINT message, WPARAM wParam = 0, LPARAM lParam = 0 );static LRESULT SendMessage( HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam )SeeSendMessage in the Win32 SDK.RemarksSends a message to the window and does not return until the window procedure has processed the message.