This call outputs the message in a buffer passed by a caller to the specified handle. The function formats the buffer to prevent words from wrapping if displayed to a screen.


DosPutMessage (FileHandle, MessageLength, MessageBuffer)


;FileHandle (USHORT) - input : Handle of the output file or device. ;MessageLength (USHORT) - input : Length of the message to be output. ;MessageBuffer (PCHAR) - input : Address of the buffer that contains the returned message.

Return Code

rc (USHORT) - return Return code descriptions are: * 0 NO_ERROR * 6 ERROR_INVALID_HANDLE * 19 ERROR_WRITE_PROTECT * 321 ERROR_MR_UN_PERFORM


Screen width is assumed to be 80 characters. The DosPutMessage call counts a CR/LF in the 80 characters that it tries to write to the screen. If a word extends past column 78, it is put on the next line. DosPutMessage assumes the starting cursor position is column one when handling a word wrap.

If the last character to be positioned on a line is a double-byte character that would be bisected, the rule above ensures that the character is not bisected.

Example Code

C Binding


USHORT rc = DosPutMessage(FileHandle, MessageLength, MessageBuffer);

USHORT FileHandle; /* Handle of output file/device */ USHORT MessageLength; /* Length of message buffer */ PCHAR MessageBuffer; /* Message buffer */

USHORT rc; /* return code */ </PRE>

MASM Binding


PUSH WORD FileHandle ;Handle of output file/device PUSH WORD MessageLength ;Length of message buffer PUSH@ OTHER MessageBuffer ;Message buffer CALL DosPutMessage

Returns WORD </PRE>


en/docs/fapi/dosputmessage.txt · Last modified: 2018/08/31 11:19 by prokushev