long FileFindFirst	(	string	file_filter,
		out string	returned_filename,
		int	common_flag = 0
	)

Starts the search of files or subdirectories in a directory in accordance with the specified filter

Parameters

file_filter	Search filter (wildcards allowed)
returned_filename	The returned parameter, where, in case of success, the name of the first found file or subdirectory is placed. Only the file name is returned (including the extension), the directories and subdirectories are not included no matter
common_flag	Reserved

Returns

Returns handle of the object searched, which should be used for further sorting of files and subdirectories by the FileFindNext() function,
or INVALID_HANDLE when there is no file and subdirectory corresponding to the filter (in the particular case - when the directory is empty).
After searching, the handle must be closed using the FileFindClose() function.