大家帮忙看下WINCC的C语句哪里错了。

unsignedlongDJS;
if(DJS==46)
{
SeTPrOPChar(lpszPictureName,"画面窗口1","Tagprefix","no46.");
SetPropChar(lpszPictureName,"画面窗口1","Picturename","motor-bp1.pdl");
SetPropChar(lpszPictureName,"画面窗口2","Tagprefix","PID3.");
SetPropChar(lpszPictureName,"画面窗口2","Picturename","motor-bp2.pdl");
SetPropChar(lpszPictureName,"画面窗口3","Tagprefix","AI144.");
SetPropChar(lpszPictureName,"画面窗口3","Picturename","motor-bp4.pdl");
SetPropBOOL(lpszPictureName,"画面窗口1","Visible",1);
SetPropBOOL(lpszPictureName,"画面窗口2","Visible",1);
SetPropBOOL(lpszPictureName,"画面窗口3","Visible",1);
}
elseif(DJS==49)
{
SetPropChar(lpszPictureName,"画面窗口1","Tagprefix","no49.");
SetPropChar(lpszPictureName,"画面窗口1","Picturename","motor-bp1.pdl");
SetPropChar(lpszPictureName,"画面窗口2","Tagprefix","PID4.");
SetPropChar(lpszPictureName,"画面窗口2","Picturename","motor-bp2.pdl");
SetPropChar(lpszPictureName,"画面窗口3","Tagprefix","AI145.");
SetPropChar(lpszPictureName,"画面窗口3","Picturename","motor-bp4.pdl");
SetPropBOOL(lpszPictureName,"画面窗口1","Visible",1);
SetPropBOOL(lpszPictureName,"画面窗口2","Visible",1);
SetPropBOOL(lpszPictureName,"画面窗口3","Visible",1);
}
elseif(DJS==65)
{
SetPropChar(lpszPictureName,"画面窗口1","Tagprefix","no65.");
SetPropChar(lpszPictureName,"画面窗口1","Picturename","motor-bp1.pdl");
SetPropChar(lpszPictureName,"画面窗口2","Tagprefix","PID5.");
SetPropChar(lpszPictureName,"画面窗口2","Picturename","motor-bp2.pdl");
SetPropChar(lpszPictureName,"画面窗口3","Tagprefix","AI146.");
SetPropChar(lpszPictureName,"画面窗口3","Picturename","motor-bp4.pdl");
SetPropBOOL(lpszPictureName,"画面窗口1","Visible",1);
SetPropBOOL(lpszPictureName,"画面窗口2","Visible",1);
SetPropBOOL(lpszPictureName,"画面窗口3","Visible",1);
}
以上语句就是不执行，三个画面窗口都不调用，如果不要else就只是执行最后一个。

问题补充：
DJS是一个内部变量，我在别的地方已经赋值，赋值我看过，在一个输入输出域里面显示46了。但是三个画面就是不显示。

最佳答案

if
elseif
elseif
最后应该还有个
else
最后的else可以省略不写，程序控制结构完善，没啥问题啊

提问者对于答案的评价：
谢谢