void
GetBorders(handle)
    HWND handle
PREINIT:
    int aBorders [3];
PPCODE:
    if(SendMessage(handle, SB_GETBORDERS, (WPARAM) 0, (LPARAM) aBorders) == TRUE) {
        EXTEND(SP,3);
        XST_mIV(0,aBorders[0]);
        XST_mIV(1,aBorders[1]);
        XST_mIV(2,aBorders[2]);
        XSRETURN(3);
    }
    else {
        XSRETURN_UNDEF;
    }