Is it numeric

[nicktherod]

I have an edit box and I want only numbers coming in. In C there is the IsNumeric(), is there anything like that for VC++.

Thanks

 

[bsisko]

Since C++ is a supeset of C, and Visual C++ is a ANSI compliance compiler, you'd think that the IsNumeric() would work in Visual C++.

 

[Mongooses]

One option is to use the class wizard and assign a member variable to the edit control and assign the data type by selecting the appropriate data type (i.e. int, uint, long, double, float, etc.) This will allow only numeric values. You can also assign a valid range for the edit box.

HTH,
jc

 

[crux]

If you create a derived class from CEdit and overwrite the
fuction OnChar() ( WM_CHAR ) than you can prevent alpha-characters coming in to the control:

void CYourClass::OnChar(............)
{
if ( nChar < 48 || nChar > 57 )
{
MessageBeep( ( WORD ) ) - 1 );
return;
}

CEdit::OnChar(...........)
}