file_GetExt

Get the file extension of a filename.

bool CExtAPI::file_GetExt(ZVAR hStr, const char* lpFileName);

False if no extension was found or if an error occurred, and true otherwise (with hStr containing the file extension, without the dot).

If a file has multiple extensions, such as 'test.tar.gz', file_GetExt will return the whole extension string (e.g. 'tar.gz'). To get the last extension, call file_GetExt recursively on the file extension until false is returned.

Taken from L3DTio_FI.DLL:

...

// create a temp var to contain the file extension
ZVAR hStr = theAPI.var_CreateTemp(VarID_string);
if(!hStr) return false;

// get the file extension of lpFileName argument
if(!theAPI.file_GetExt(hStr, lpFileName)) {
    theAPI.var_Delete(hStr);
    return false;
}

char FileExt[MAX_PATH]; // declare a char array, into which we'll put the file extension
sprintf(FileExt, "%s", theAPI.str_GetText(hStr));

theAPI.var_Delete(hStr); // done with the temp string var, so delete

...