我有个脚本代码，编译报错，请各位大侠帮我解答解答
int a;
double b;
a=GetPropWord(lpszPictureName,"zh","SelIndex");
switch(a)
{
case 1:
SetTagDouble(b,500);
break;
case 2:
SetTagDouble(b,60000);
break;
case 3:
SetTagDouble(b,3600000);
break;
default :break;
}
报错
line10 error(0069)type mismatch in argument 1
line13 error(0069)type mismatch in argument 1
line16 error(0069)type mismatch in argument 1