WHCAR无法转化LPWSTR //下面为啥不行???

WCHAR path[512]=L"E:/data/tool/data_process/singer_big_picture";
strstring(path,L"Image.jpg") 

bool strstring(LPWSTR *ParentString,LPWSTR *SubString) 
{

}

[解决办法]
bool?strstring(LPWSTR?ParentString,LPWSTR?SubString)?
{
?????
}