请哪位高手帮忙检查下面的全局脚本问题在哪里，为什么运行不了。谢谢啦
#include "apdefap.h"

int gscAction( void )
{
// WINCC:TAGNAME_SECTION_START
// syntax: #define TagNameInAction "DMTagName"
// next TagID : 1
// WINCC:TAGNAME_SECTION_END

// WINCC:PICNAME_SECTION_START
// syntax: #define PicNameInAction "PictureName"
// next PicID : 1
// WINCC:PICNAME_SECTION_END

return 0;
if(GetTagBit("weizhi")==1)
{
SetTagWord("Xlocation",500);
SetTagWord("Ylocation",400);
}
else if (GetTagBit("weizhi")==0)

{
SetTagWord("Xlocation",300);
SetTagWord("Ylocation",300);
}


}