c# - How do i use SetWindowPos? -

intptr handle = process.mainwindowhandle; if (handle != intptr.zero) {     setwindowpos(handle, 0, 0, 0, 0, 0, swp_nozorder | swp_nosize | swp_showwindow); } 

then when call in constructor example setwindowpos should give ? handle fine know should be. resr 0,0,0,0,0,0 , should values fro swp_nozorder , swp_nosize ?

what want bring handle front , center of screen. bring front know how i'm using setforegroundwindow(intptr hwnd); , it's working fine. how use setwindowpos force in center of screen ?

before can center it, first must know how big is. can accomplished getwindowrect() api. after it's matter of calculating center position taking account size of screen:

public partial class form1 : form {      [dllimport("user32.dll")]     [return: marshalas(unmanagedtype.bool)]     static extern bool getwindowrect(intptr hwnd, out rect lprect);      [structlayout(layoutkind.sequential)]     public struct rect     {         public int left;        // x position of upper-left corner         public int top;         // y position of upper-left corner         public int right;       // x position of lower-right corner         public int bottom;      // y position of lower-right corner     }      private const int swp_nosize = 0x0001;     private const int swp_nozorder = 0x0004;     private const int swp_showwindow = 0x0040;      [dllimport("user32.dll", setlasterror=true)]     static extern bool setwindowpos(intptr hwnd, intptr hwndinsertafter, int x, int y, int cx, int cy, int uflags);      process process;      public form1()     {         initializecomponent();         process = process.getprocessesbyname("calc").firstordefault();     }      private void button1_click(object sender, eventargs e)     {         if (process == null)             return;          intptr handle = process.mainwindowhandle;         if (handle != intptr.zero)         {             rect rct;             getwindowrect(handle, out rct);             rectangle screen = screen.fromhandle(handle).bounds;             point pt = new point(screen.left + screen.width / 2 - (rct.right - rct.left) / 2, screen.top + screen.height / 2 - (rct.bottom - rct.top) / 2);             setwindowpos(handle, intptr.zero, pt.x, pt.y, 0, 0, swp_nozorder | swp_nosize | swp_showwindow);         }     }  }