战舰V3移植STEMWIN+UCOSII后使用GUI_Delay()函数四级是为什么？

void display_task(void *pdata)
{
////GUI_DispChar('A');
// GUI_DispCharAt('C', 110, 120);
while(1)
{
Buttonbmp_Demo();
//GUI_Exec();//===============================??????
//OStimeDlyHMSM(0,0,0,100);
}
}
任务函数
void Buttonbmp_Demo(void)
{
WM_HWIN hWin;
hWin=CreateFramewin();
while(1)
{
//GUI_Exec();//===============================??????
//printf("chuangjianchenggong");
GUI_Delay(100);
//printf("chuangjianchenggong");
}
}