Other handles (file, sql)
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This page covers handle datatype (Sql, file etc) tips & tricks.
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What are the errorcodes returned by VisFile functions
The following list are VisFile return codes. They can be found in
SAL Extension V2.04 library.
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
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
