调用api画图问题

[spie1]

声明－－－－－－－－－－－－－－－－－－－－－－－－－－－－－
Function Uint GetDC(Uint hWnd) Library"user32.dll"
Function Uint CreatePen(int PenStale,int Width,long ColorRef) library"GDI32.dll"
Function Uint SelectObject(Uint hDC,Uint hGDIObj) library"GDI32.DLL"
FUNCTION ulong MoveToex(ulong hdc,ulong x,ulong y,ref point lp) LIBRARY "gdi32.dll"
Function Uint lineto(Uint hDC,int xEnd,int yEnd) library"GDI32.dll"

open事件－－－－－－－－－－－－－－－－－－－－－－－－－－－－

point lp
Uint lu_HWD,LU_hDC,LU_PEN,LU_OBJDC
lu_HWD= HANDLE(dw_1)//DW的句柄
LU_hDC=GetDC(lu_HWD)//图形设备句柄
LU_PEN=CreatePen(0,1,RGB(255,0,0))//红实线
LU_OBJDC=SelectObject(LU_hDC,LU_PEN)
Movetoex( LU_hDC,0,0,lp)
lineto( LU_hDC,1210,650)

以上代码运行到movetoex就出错退出了，请问可能是哪里写错了呀？