# IsArchive

Check whether the specified file is an archive.

    BOOL WINAPI IsArchive(
      const char *Name,
      const unsigned char *Data,
      int DataSize
    );

### Parameters

Name
Archive name
Data
archive file data (pointer to data of DataSize size relative to the beginning of the file)
DataSize
the size of data passed to the function

### Return value

TRUE if the archive type is supported by plugin.

### Example

An example of ZIP archive definition (ZIP.CPP)

    BOOL WINAPI _export IsArchive(const char *Name,
                          const unsigned char *Data,
                          int DataSize)
    {
      for (int I=0;I < DataSize-10;I++)
      {
        const unsigned char *D=Data+I;
        if (D[0]=='P' && D[1]=='K' &&
            D[2]==3   && D[3]==4   &&
            D[8]<15   && D[9]==0)
        {
          SFXSize=I;
          return(TRUE);
        }
      }
      return(FALSE);
    }

See also:
archive support