OK, I simply added code to the OnMaximizeEvent and OnResizeEvent to remove and restore the sizing border when maximizing and restoring so it works nicely now:

Code:
function OnResizeEvent(){
   RECT r;
   //Replace the sizing border
   video_window(NULL, NULL, 4+16+32+64+128, 0); 
   GetClientRect(hWnd,&r); 
   video_set(r.right,r.bottom,0,0); 
}

function OnMaximizeEvent(){
   RECT r;
   //Remove the sizing border without using video_window and set to open maximized
   SetWindowLong(hWnd, GWL_STYLE, WS_OVERLAPPED|WS_CAPTION|WS_SYSMENU|WS_MINIMIZEBOX|WS_MAXIMIZEBOX|WS_MAXIMIZE);
   //Activate the last change from above
   SetWindowPos(hWnd, NULL, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | SWP_FRAMECHANGED); 
   GetClientRect(hWnd,&r); 
   video_set(r.right,r.bottom,0,0); 
}


Joris Lambrecht
My Contributions: Relative Rotation, Window Sizing