ShowWindow can't bring to front[Resolved]

[mar_zim]

[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);
}

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.

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).