使用WINAPI在c＃中單擊'OK'按鈕的消息框。

Question

我想單擊使用winapi的C＃窗體消息框的「確定」按鈕。以下是我正在處理的代碼。

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); 

雖然我得到了hwndChild的值，它是不承認BN_CLICKED。 我不知道我錯過了什麼。任何幫助？

我想關閉另一個應用程序的消息框按鈕，這就是我正在做的。但是，我仍然錯過了一些東西。

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

Answer 1

Finallu，這對我的作品。 首先點擊可能會激活窗口，然後點擊按鈕。

SendMessage(btnHandle, WM_LBUTTONDOWN, 0, 0); 
SendMessage(btnHandle, WM_LBUTTONUP, 0, 0); 
SendMessage(btnHandle, WM_LBUTTONDOWN, 0, 0); 
SendMessage(btnHandle, WM_LBUTTONUP, 0, 0); 

Answer 2

BN_CLICKED不是消息。您需要發送WM_COMMAND消息，其中包含BN_CLICKED通知和wParam中的按鈕ID以及lParam中的按鈕處理。

該按鈕的父窗口通過WM_COMMAND消息收到此通知代碼 。

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);