在 C# 中没有提供方法用来对 MessageBox 进行定位,但是通过 C++ 你可以查找窗口并移动它们,本文讲述如何在 C# 中对 MessageBox 进行定位。
首先需在代码上引入所需名字空间:
using System.Runtime.InteropServices;using System.Threading;
在你的 Form 类里添加如下 DllImport 属性:
[DllImport("user32.dll")]static extern IntPtr FindWindow(IntPtr classname, string title); // extern method: FindWindow [DllImport("user32.dll")]static extern void MoveWindow(IntPtr hwnd, int X, int Y, int nWidth, int nHeight, bool rePaint); // extern method: MoveWindow [DllImport("user32.dll")]static extern bool GetWindowRect(IntPtr hwnd, out Rectangle rect); // extern method: GetWindowRect
接下来就可以查找窗口并移动它:
void FindAndMoveMsgBox(int x, int y, bool repaint, string title){ Thread thr = new Thread(() => // create a new thread { IntPtr msgBox = IntPtr.Zero; // while there's no MessageBox, FindWindow returns IntPtr.Zero while ((msgBox = FindWindow(IntPtr.Zero, title)) == IntPtr.Zero) ; // after the while loop, msgBox is the handle of your MessageBox Rectangle r = new Rectangle(); GetWindowRect(msgBox, out r); // Gets the rectangle of the message box MoveWindow(msgBox /* handle of the message box */, x , y, r.Width - r.X /* width of originally message box */, r.Height - r.Y /* height of originally message box */, repaint /* if true, the message box repaints */); }); thr.Start(); /: starts the thread}
你要在 MessageBox.Show 之前调用这个方法,并确保 caption 参数不能为空,因为 title 参数必须等于 caption 参数。
使用方法:
FindAndMoveMsgBox(0,0,true,"Title");MessageBox.Show("Message","Title");
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