Header File 

io.h, wchar.h 

Category 

Directory Control Routines 

Prototype 

long _findfirst(char *filter, struct _finddata_t *fileinfo); 

long __wfindfirst(wchar_t *filter, struct _wfinddata_t *fileinfo); 

Description 

Begins a search of a disk directory to find information about the first instance of a filename that matches a specified filter. The filter parameter is a string that specifies which files to return. Wildcards may be used in the filter. The fileinfo parameter is the file information buffer. If a matching file is found, the fileinfo structure is filled with the file-directory information. 

These functions are provided for Microsoft compatibility. 

Return Value 

On success, returns a unique search handle to a file or group of files matching the filter specification. 

Otherwise, returns –1 and sets errno to one of the following values: 

ENOENTPath or file name not found 

EINVALInvalid filename specification 

Portability