PANEL* main_pan = 
{
 //bmap = "main.bmp";	
 pos_x = 100;
 pos_y = 100;
 flags = SHOW; 
 layer = 40; // -> pan_setbutton layer ebende ;)
}
...
function create_hwnd_but()
{  
 hwnd_but_small[i_3] = pan_setbutton(main_pan,0,0,150,0,hwnd_button_up,hwnd_button_down,hwnd_button_up,NULL,move_me,NULL,NULL);
 hwnd_but_small[i_3] = pan_setbutton(main_pan,0,0,250,250,hwnd_button_up,hwnd_button_down,hwnd_button_up,NULL,kill_hwnd,NULL,NULL);
}
...

function move_me()
{
 while(mouse_left == 1)
 {  
  ...
  main_pan.pos_x += mickey.x;   
  main_pan.pos_y += mickey.y;

  wait(1);
 }	
}