Question

winform用SendMessage怎么发送一个鼠标消息，指定鼠标在某个窗口（32，32）处按下,指定坐标在sendmess

Answer 1

你先要用FindWindow(string lpClassName,string lpWindowName)获取该窗口的句柄
IntPtr hwnd QQ= FindWindow(null,"QQ2011");这样就能获取QQ登录窗口的句柄
然后再使用SendMessage(IntPtr hwnd,int msg,IntPtr wParam,IntPtr lParam)
向该窗口发送消息
SendMessage(hwndQQ,WM_LBUTTONDBLCLK ,MK_LBUTTON,32 * 65535 + 32);
public const int WM_LBUTTONDBLCLK = 515
public const int MK_LBUTTON = 1;
(在电脑中搜索winuser.h,这个文件中包含消息值)
这个消息是左键单击消息
lParam的低16位填鼠标位置的x值，高16位填y值
要先声明
[DllImport( "user32.dll ", CharSet=CharSet.Auto)]
public static extern int SendMessage(int hWnd, int msg, IntPtr wParam, IntPtr lparam);
[DllImport( "user32.dll ", CharSet=CharSet.Auto)]
public static extern IntPtr FindWindow(string lpClassName,string lpWindowName);

追问

现在就是用这种方法，可是 IntPtr lparam这个参数怎么设置。只知道x，y

追答

IntPtr lParam = (IntPtr)(y * 65535 + x);

追问

那在传过去的信息里面，如何获取这个x，y呢

追答

///
/// 获得低十六位
///
///
///
public static int LOWORD(int wParam){
return (wParam & 0x0000ffff);
}

获取高十六位
public static int HIWORD(int wParam){
return (wParam >> 16);
}

对不起，上面65535应该改成65536，不小心写错了

追问

是public static int LOWORD(int wParam){
return (wParam & 0x0000ffff);
}

还是public static int LOWORD(int wParam){
return (lParam & 0xFFFF);
}

追答

上面一个

追问

有没有qq，我能不能加你

追答

我不用QQ的!

追问

我搞出来了，发送 Class1.SendMessage(inPTR2, Class1.WM_LBUTTONDOWN, (UInt32)inPTR1, (e.Y * 65536 + e.X));
接收 iPreLParam = m.LParam.ToInt32();
iMoveX = (iPreLParam & 0x0000ffff);
iMoveY = (iPreLParam >> 16);
但是有个问题，如何让图片居中画呢

追答

你想在哪上面画图？详细介绍 一下你的需求

Answer 2

/// <summary>
/// 发送鼠标左键单击消息
/// </summary>
/// <param name="x">X坐标</param>
/// <param name="y">Y坐标</param>
public static void EsSendKey_MouseLeftClick(int x, int y)
{
int xx = Screen.PrimaryScreen.Bounds.Width;
int yy = Screen.PrimaryScreen.Bounds.Height;
mouse_event(MOUSEEVENTF_ABSOLUTE | MOUSEEVENTF_MOVE | MOUSEEVENTF_LEFTDOWN | MOUSEEVENTF_LEFTUP, x * 65536 / xx, y * 65536 / yy, 0, 0);
}

/// <summary>
/// 鼠标事件
/// </summary>
[DllImport("user32.dll")]
private static extern int mouse_event(int dwFlags, int dx, int dy, int cButtons, int dwExtraInfo);

没用过SendMessage 我自己写的