Other handles (file, sql)

Handle datatype (Window/SQL/File)

What are the errorcodes returned by VisFile functions

The following list are VisFile return codes:

Number: ERROR_FILE_NOT_FOUND 		= -2
Number: ERROR_PATH_NOT_FOUND 		= -3
Number: ERROR_TOO_MANY_OPEN_FILES 	= -4
Number: ERROR_ACCESS_DENIED 		= -5
Number: ERROR_INVALID_HANDLE 		= -6
Number: ERROR_NOT_ENOUGH_MEMORY 	= -8
Number: ERROR_BAD_FORMAT 		= -11
Number: ERROR_OUTOFMEMORY 		= -14
Number: ERROR_INVALID_DRIVE 		= -15
Number: ERROR_CURRENT_DIRECTORY 	= -16
Number: ERROR_NOT_SAME_DEVICE 		= -17
Number: ERROR_NO_MORE_FILES 		= -18
Number: ERROR_WRITE_PROTECT 		= -19
Number: ERROR_NOT_READY 		= -21
Number: ERROR_BAD_COMMAND 		= -22
Number: ERROR_OUT_OF_PAPER 		= -28
Number: ERROR_WRITE_FAULT 		= -29
Number: ERROR_READ_FAULT 		= -30
Number: ERROR_SHARING_VIOLATION 	= -32
Number: ERROR_LOCK_VIOLATION 		= -33
Number: ERROR_WRONG_DISK                = -34
Number: ERROR_HANDLE_EOF 		= -38
Number: ERROR_HANDLE_DISK_FULL 		= -39
Number: ERROR_NOT_SUPPORTED 		= -50

The list of constants can be found in the SalExtension archives
SalExtension archives

How to check if a file is already opened

Use this to check if a file is already opened.

   If SalFileOpen( hFile, sFile, OF_Share_Exclusive ) 
      ! File was not open, now it is and it is locked by this process
      ! ... do file stuff ...
      ! Dont forget to close the file 
      ! Call SalFileClose( hFile )
   Else
      ! File is opened by this or another process