C# 如何将焦点设置到另一个窗口？
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How to set focus to another window?
提问by Endiss
I have a problem with a program that loses focus. It's not my program. How can I write a second program to set focus to that window every 1-2 seconds? Is is possible to do that?
我有一个失去焦点的程序的问题。这不是我的程序。如何编写第二个程序以每 1-2 秒将焦点设置到该窗口？有可能这样做吗？
采纳答案by Rajesh Subramanian
You can use following Win32 API if you want to bring some other program/process
如果你想带一些其他的程序/进程，你可以使用以下 Win32 API
[DllImport("user32.dll")]
static extern bool SetForegroundWindow (IntPtr hWnd);
private void BringToFront(Process pTemp)
{
SetForegroundWindow(pTemp.MainWindowHandle);
}
回答by Pradeep Bogati
use spy++ or other ui tools to find the class name of the window you want to focus, say its: focusWindowClassName. Then add the below functions:
使用 spy++ 或其他 ui 工具查找要聚焦的窗口的类名，说它：focusWindowClassName。然后添加以下函数：
[DllImport("USER32.DLL")]
public static extern bool SetForegroundWindow(IntPtr hWnd);
[System.Runtime.InteropServices.DllImport("User32.dll")]
public static extern bool ShowWindow(IntPtr handle, int nCmdShow);
[DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
//Then:
// [Edit] Changed IntPrt to IntPtr
IntPtr hWnd = FindWindow("focusWindowClassName", null); // this gives you the handle of the window you need.
// then use this handle to bring the window to focus or forground(I guessed you wanted this).
// sometimes the window may be minimized and the setforground function cannot bring it to focus so:
/*use this ShowWindow(IntPtr handle, int nCmdShow);
*there are various values of nCmdShow 3, 5 ,9. What 9 does is:
*Activates and displays the window. If the window is minimized or maximized, *the system restores it to its original size and position. An application *should specify this flag when restoring a minimized window */
ShowWindow(hWnd, 9);
//The bring the application to focus
SetForegroundWindow(hWnd);
// you wanted to bring the application to focus every 2 or few second
// call other window as done above and recall this window again.
