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move mouse toward right side for 1 unit

Troudeloup asked
Last Modified: 2012-08-13
I use this function to move mouse cursor to toward right side.

yet on different systems this produces varied mouse move speed, which is a problem.
how do I make the mouse cursor to travel at uniform speed regardless of system delays?

void mousemove_horizontal_line( HWND hwnd1, int x1, int x2, int y )
      POINT p;
      p.x = x1;
      p.y = y;
      ClientToScreen( hwnd1, &p );
      SetCursorPos( p.x, p.y );

      ScreenToClient( hwnd1, &p );
      //cout << p.x << endl;      
      while ( p.x < x2 )
            ScreenToClient( hwnd1, &p );
            mouse_event( MOUSEEVENTF_MOVE, 1, 0, 0, 0 );
            //Sleep ( 10 );
            if ( ( p.x % 5 ) == 0 )
                  Sleep ( 1 );
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