ShowWindow can't bring to front[Resolved]

Code:

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[DllImport("user32")]
public static extern int ShowWindow(int hwnd, int nCmdShow);
[DllImport("user32")]
public static extern int UpdateWindow(int hwnd);

Process[] p = Process.GetProcessesByName("WindowsApplication4");
int i=int.Parse(p[0].MainWindowHandle.ToString());
if(i != 0)
{
        ShowWindow(i,9);
        UpdateWindow(i);
}

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i have that code that works fine in restoring a window(window in minimize mode) but when i didn't minimize the application just lost the focus it will not bring to front i tried all the combination of command show but still no luck.

Code:

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hwnd
The handle of the window to change the show status of.
nCmdShow
Exactly one of the following flags specifying how to show the window:

SW_HIDE = 0
Hide the window.
SW_MAXIMIZE = 3
Maximize the window.
SW_MINIMIZE = 6
Minimize the window.
SW_RESTORE = 9
Restore the window (not maximized nor minimized).
SW_SHOW = 5
Show the window.
SW_SHOWMAXIMIZED = 3
Show the window maximized.
SW_SHOWMINIMIZED = 2
Show the window minimized.
SW_SHOWMINNOACTIVE = 7
Show the window minimized but do not activate it.
SW_SHOWNA = 8
Show the window in its current state but do not activate it.
SW_SHOWNOACTIVATE = 4
Show the window in its most recent size and position but do not activate it.
SW_SHOWNORMAL = 1
Show the window and activate it (as usual).

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Just a guess here but try looking for a FindWindow api. I guess that should do it. FindWindow and then ShowWindow your form.