8

我正在尝试使用 winapi 在 C# windows 窗体的消息框中单击“确定”按钮。下面是我正在处理的代码。

private const int WM_CLOSE = 16;
private const int BN_CLICKED = 245;

[DllImport("user32.dll", CharSet=CharSet.Auto)]
        public static extern int SendMessage(int hWnd, int msg, int wParam, IntPtr lParam);

[DllImport("user32.dll", SetLastError = true)]
        public static extern IntPtr FindWindowEx(IntPtr parentHandle, IntPtr childAfter, string className,  string  windowTitle);

//this works
hwnd = FindWindow(null, "Message");
if(hwnd!=0)
      SendMessage(hwnd, WM_CLOSE, 0, IntPtr.Zero);

//this doesn't work.
hwndChild = FindWindowEx((IntPtr)hwnd, IntPtr.Zero, "Button", "ok");
SendMessage((int)hwndChild, BN_CLICKED, 0, IntPtr.Zero);

虽然我得到了一个值hwndChild,但它没有识别BN_CLICKED。我不确定我错过了什么。有什么帮助吗?

我正在尝试关闭另一个应用程序的消息框按钮,这就是我正在做的事情。但是,我仍然缺少一些东西。

IntPtr hwndChild = IntPtr.Zero;
hwndChild = FindWindowEx((IntPtr)hwnd, IntPtr.Zero,' '"Button", "OK");
SendMessage((int)hwndChild, WM_COMMAND, (BN_CLICKED '<<16) | IDOK, hwndChild);
4

2 回答 2

12

BN_CLICKED 不是消息。您需要发送一条 WM_COMMAND 消息,其中包含BN_CLICKED通知和 中的按钮 IDwParam以及 中的按钮句柄lParam

按钮的父窗口通过 WM_COMMAND 消息接收到这个通知代码。

private const uint WM_COMMAND = 0x0111;
private const int BN_CLICKED = 245;
private const int IDOK = 1;

[DllImport("user32.dll", CharSet=CharSet.Auto)]
        public static extern int SendMessage(IntPtr hWnd, uint msg, int wParam, IntPtr lParam);

[DllImport("user32.dll", SetLastError = true)]
        public static extern IntPtr FindWindowEx(IntPtr parentHandle, IntPtr childAfter, string className,  string  windowTitle);

SendMessage(hwndChild, WM_COMMAND, (BN_CLICKED << 16) | IDOK, hwndChild);
于 2013-02-19T16:18:29.860 回答
7

Finallu,这对我有用。第一次单击可能会激活窗口,第二次单击可能会单击按钮。

SendMessage(btnHandle, WM_LBUTTONDOWN, 0, 0);
SendMessage(btnHandle, WM_LBUTTONUP, 0, 0);
SendMessage(btnHandle, WM_LBUTTONDOWN, 0, 0);
SendMessage(btnHandle, WM_LBUTTONUP, 0, 0);
于 2013-02-19T18:26:33.107 回答