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POHow to hide/show a Process using c#?
 

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  1. POHow to hide/show a Process using c#?
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    <p>While executing my program, I want to hide/minimize Microsoft Speech Recognition Application:</p> <p><a href="http://img143.imageshack.us/img143/9380/minimize.png">alt text http://img143.imageshack.us/img143/9380/minimize.png</a></p> <p>and at the end I want to show/maximize using c#!</p> <p>This process is not started by me so I can't give control the process startInfo.</p> <p>I've tried to use user32.dll methods such as:</p> <ol> <li>ShowWindow</li> <li>AnimatedWindows</li> <li>AnimatedWindows</li> <li>SetForegroundWindow</li> <li>SetWindowPos</li> </ol> <p>With all of them I have the same problem.</p> <p>I can hide the windows (althought I have to call one of the methods two times with SW_HIDE option), but when I call the method with a SW_SHOW flag, it simply doesn't shows..</p> <p>How can I maximize/show after hiding the process?</p> <p>Thanks in advance!</p> <p>Here is some pieces of the code, now implemented to use SetWindowPlacement:</p> <pre><code>{ [DllImport("user32.dll")] [return: MarshalAs(UnmanagedType.Bool)] public static extern bool GetWindowPlacement(IntPtr hWnd, ref WINDOWPLACEMENT lpwndpl); [DllImport("user32.dll", SetLastError = true)] [return: MarshalAs(UnmanagedType.Bool)] static extern bool SetWindowPlacement(IntPtr hWnd, [In] ref WINDOWPLACEMENT lpwndpl); [DllImport("user32.dll")] public static extern Boolean ShowWindowAsync(IntPtr hWnd, Int32 nCmdShow); [DllImport("user32.dll")] public static extern Boolean SetForegroundWindow(IntPtr hWnd); [DllImport("user32.dll")] public static extern Boolean ShowWindow(IntPtr hWnd, Int32 nCmdShow); [DllImport("user32.dll")] public static extern Boolean AnimateWindow(IntPtr hWnd, uint dwTime, uint dwFlags); [DllImport("dwmapi.dll")] public static extern int DwmSetWindowAttribute(IntPtr hwnd, uint dwAttribute, IntPtr pvAttribute, IntPtr lol); //Definitions For Different Window Placement Constants const UInt32 SW_HIDE = 0; const UInt32 SW_SHOWNORMAL = 1; const UInt32 SW_NORMAL = 1; const UInt32 SW_SHOWMINIMIZED = 2; const UInt32 SW_SHOWMAXIMIZED = 3; const UInt32 SW_MAXIMIZE = 3; const UInt32 SW_SHOWNOACTIVATE = 4; const UInt32 SW_SHOW = 5; const UInt32 SW_MINIMIZE = 6; const UInt32 SW_SHOWMINNOACTIVE = 7; const UInt32 SW_SHOWNA = 8; const UInt32 SW_RESTORE = 9; public sealed class AnimateWindowFlags { public const int AW_HOR_POSITIVE = 0x00000001; public const int AW_HOR_NEGATIVE = 0x00000002; public const int AW_VER_POSITIVE = 0x00000004; public const int AW_VER_NEGATIVE = 0x00000008; public const int AW_CENTER = 0x00000010; public const int AW_HIDE = 0x00010000; public const int AW_ACTIVATE = 0x00020000; public const int AW_SLIDE = 0x00040000; public const int AW_BLEND = 0x00080000; } public struct WINDOWPLACEMENT { public int length; public int flags; public int showCmd; public System.Drawing.Point ptMinPosition; public System.Drawing.Point ptMaxPosition; public System.Drawing.Rectangle rcNormalPosition; } //this works param = new WINDOWPLACEMENT(); param.length = Marshal.SizeOf(typeof(WINDOWPLACEMENT)); param.showCmd = (int)SW_HIDE; lol = SetWindowPlacement(theprocess.MainWindowHandle, ref param); // this doesn't work WINDOWPLACEMENT param = new WINDOWPLACEMENT(); param.length = Marshal.SizeOf(typeof(WINDOWPLACEMENT)); param.showCmd = SW_SHOW; lol = GetWindowPlacement(theprocess.MainWindowHandle, ref param); </code></pre> <p>NOTE: Does the SAPI API has a command to minimize this minimize and maximize this window?</p>
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