C++/CLI Make Borderless Form Sizeable

Question

Hello , how can I convert this c# code to C++/CLI code to make my borderless form SizeAble?

  this - > SetStyle(ControlStyles::ResizeDraw, true);
  private
  const int cGrip = 16;
  private
  const int cCaption = 32;
  protected override void WndProc(ref Message m)
  {
      if(m.Msg == 0x84)
      {
          Point pos = new Point(m.LParam.ToInt32());
          pos = this.PointToClient(pos);
          if(pos.Y < cCaption)
          {
              m.Result = (IntPtr) 2;
              return;
          }
          if(pos.X\ >= this.ClientSize.Width - cGrip && pos.Y\ >= this.ClientSize.Heigh - cGrip)
          {
              m.Result = (IntPtr) 17;
              return;
          }
      }
      base.WndProc(ref m);
  }

Answer 1

Try adding this code to your form class:

#include <Windows.h>

. . .


private:

    const int cGrip = 16;
    const int cCaption = 32;

protected:
    void WndProc( Message% m ) override
    {
        switch( m.Msg )
        {
        case WM_NCHITTEST:
            Point pos = Point( m.LParam.ToInt32( ) );
            pos = PointToClient( pos );

            if( pos.Y < cCaption )
            {
                m.Result = IntPtr( HTCAPTION );
                return;
            }
            if( pos.X >= ClientSize.Width - cGrip && pos.Y >= ClientSize.Height - cGrip )
            {
                m.Result = IntPtr( HTBOTTOMRIGHT );
                return;
            }
            break;
        }

        __super::WndProc( m );
    }

. . .