## Display Device Driver Reference for OS/2

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### Function 100h - Returns

The Text Buffer Update routine returns with AX = 0, if no error was detected. Otherwise, the following error codes are returned in AX:

        ERROR_VIO_COL,              if an invalid column number was specified

        ERROR_VIO_INVALID_LENGTH,   if the ParmLength was incorrect

        ERROR_VIO_INVALID_PARMS,    if the Index was incorrect

        ERROR_VIO_MODE,             if updates are not supported in the

                                      current video mode

        ERROR_VIO_ROW,              if an invalid row number was specified.