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how do i restrict user not to type more than 5 lines in RTFBox

Posted on 2003-11-11
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Last Modified: 2010-05-03
how do i restrict user not to type more than 5 lines in RTFBox. I am using SendMessage API method (in keypress event), which returns me nos. of line but when i press any key at the end of fifth line, it wrap the last word on sixth line, this is only the problem, otherwise it works fine.

It is very urgent, any help, idea, or clue will be highly obliged. Thanks in advance.
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Question by:nirmal_4194
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Expert Comment

by:GrahamSkan
ID: 9721673
Does
Keyascii = 0
not work (as in a standard textbox?)
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Author Comment

by:nirmal_4194
ID: 9738183
Yes it works, but by the time the last word jumps to 6th line.

Can you give me coding which you have tested.

Thanks for response.
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Expert Comment

by:GrahamSkan
ID: 9738687
Good point.

This is tested:

Private Sub RTB_Change()
    Do While RTB.GetLineFromChar(Len(RTB.Text)) > 5
        RTB.Text = Left$(RTB.Text, Len(RTB.Text) - 1)
    Loop
End Sub

It needs a loop, because if the user enters a wide character not at the end of the fifth line, then more than one narrow character might be displaced on to the next line.
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Author Comment

by:nirmal_4194
ID: 9873044
No it does not work. Please test it again, i am desparately need help.

Thanks for quick response
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Accepted Solution

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GrahamSkan earned 40 total points
ID: 9873286
I can find an error, but it is a simple one. The line numbers returned by the function GetLineFromChar() start at 0, so that line number 5 is actually the 6th line.
If you change the 5 to a 4, it will work,  limiting the entry to 5 lines rather than 6 lines, as my original code does.
Because this was so simple, it may be that I haven't understood the problem that you were having with the code. If so can you explain what happens?
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