Cursor in CEdit

Lescha
Lescha used Ask the Experts™
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Is it possible to get and set the text cursor (I-beam) position in CEdit control?

Here is my problem: I want to edit the text the user types while he is typing it, and for this I work with the appropriate message and, if an incorrect text has been typed, alter the string the control displays. However, every time I use SetWindowText to alter the string, the text cursor hops to the beginning of the line. Since I make this checking every time the text of the control changes, there is no need for it to move the cursor - the new character either will or will not be displayed.

Is there a solution or a workaround for my problem?
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Commented:
I think you need to use SetCaretPos to set caret and PosFromChar to calculate caret point.

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Commented:
This doesn't always work. Here is the code I use (m_ed1 is a CString variable associated with the control):

...
// Find and store the current char number
CEdit *ed = (CEdit *)GetDlgItem(IDC_EDIT1);
POINT p = ed->GetCaretPos();
int chr = ed->CharFromPos(p);
// Change the text in the edit control
UpdateData(true);
m_ed1 = m_ed1.Left(14);
m_ed1.MakeUpper();
UpdateData(false);
// Set the current char to the number stored earlier
*ed = (CEdit *)GetDlgItem(IDC_EDIT1);
p = ed->PosFromChar(chr);
ed->SetCaretPos(p);
...

This works only if the text has not been changed. If it has been changed, PosFromChar returns (-1,-1) and thus SetCaretPos sets the cursor to the beginning of the control.
Commented:
OK, there is very simple way:

pEdit->SetSel(n, n);

sets caret before symbol number n.

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