вопрос по external и др - 2

#define WS_CHILD 1073741824
#define WS_BORDER 8388608
#define WS_VISIBLE 268435456
#define OCR_WAIT 32514
#define LR_LOADFROMFILE 16
#define IMAGE_CURSOR 2
external(INT, "CreateWindow", "CreateWindowExA", "User32.dll" );
external(INT, "LoadImage", "LoadImageA", "User32.dll");
external(INT, "SetCursor", "SetCursor", "User32.dll" );
external(INT, "WindowFromPoint", "WindowFromPoint", "User32.dll" );

int mouse_x, mouse_y;
int cursor, edit1;
createdialog(0);
showdialog(0, "Dialog",100, 100, 300, 300, 1, 1);

enabletimer(0);
loop()sleep(10);


function getmessage(0, WM_CREATE)
{
edit1 = CreateWindow(0, "EDIT", "65464", WS_CHILD | WS_BORDER | WS_VISIBLE, 100, 100, 100, 20, gethwnd(0), 0, 0, 0);
cursor=LoadImage(0, "C:\Windows\Cursors\aero_busy.ani", IMAGE_CURSOR, 32, 32, LR_LOADFROMFILE); // загрузить курсор из файла
}


CREATE_TIMER(0, 100)
{
getmouse(mouse_x, mouse_y);
while(WindowFromPoint(mouse_x, mouse_y)==edit1){SetCursor(cursor); sleep(10); getmouse(mouse_x, mouse_y);}
}