em_setwordbreakproc in MFC

[ForNow]

IS there a message map entry for this message, or maybe a virtual function has taken its place

[Lost User]

Add it to some code and see if Visual Studio finds its reference. Or check the relevant section of the MSDN documentation.

[Jochen Arndt]

There is never a message map entry by "magic". They are added manually or by the class wizard. EM_* are messages send to an edit control for getting or setting properties, or starting specific operations. So there is no need to process these messages by your application and they are not supported by the class wizard. For most of these EM_* messages there are corresponding MFC functions which just send the message with some optional parameter processing. So you might for example override CEdit::GetSel() (which sends the EM_GETSEL message) to add some funcionality. In the case of EM_SETWORDBREAKPROC your application would send this message to the control to pass the address of a function. Then there is no need to handle the message because you can do the necessary operations just before or after sending the message.

[ForNow]

Let me clarify from the oninitdialog I did editcntl.Sendmessage(EM_SETWORDBREAKPROC,0,(LPARAM)editcntlwordwrap); I had assumed based on the documentation

Quote:

A Wordwrap function defines the point at which the system should break a line of text for multiline edit controls, usually at a space character that separates two words

that when I would type in a space my call back function would get control, this didn't happen. However I kept on typing and when I did get to the end of the line my call back function did get control

[ForNow]

let me clarify from the oninitdialog I did editcntl.Sendmessage(EM_SETWORDBREAKPROC,0,(LPARAM)editcntlwordwrap); I had assumed based on the documentation

Quote:

A Wordwrap function defines the point at which the system should break a line of text for multiline edit controls, usually at a space character that separates two words

that when I would type in a space my call back function would get control, this didn't happen. However I kept on typing and when I did get to the end of the line my call back function did get control

[Jochen Arndt]

How is that related to your initial question about a message map entry or a virtual function for this message? What you have quoted describes what the function usually does. I have never used it but would expect that it is called when required (e.g. every time when reaching the line limit while typing and when "the user presses arrow keys in combination with the CTRL key to move the caret to the next word or previous word"). Have a look at the EditWordBreakProc callback function (Windows)[^]. It describes the actions passed to the callback function which indicate when it is called. But it does not matter when it is called. You just have to return a value according to the requested action. For the case of word break checks (WB_ISDELIMITER), the return value is usually TRUE for a space.

[Lost User]

ForNow wrote:

I had assumed

Not how I understand that note. It only makes sense to call the function at the point that a break is likely to occur, not for every space character.