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UpDownControl settings?

Posted on 1998-10-16
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Last Modified: 2013-12-03
How do i set the stepsize and position in an UpDownControl?
I don´t want to wait until i get a WM_NOTIFY.
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Question by:AndersCarlsson
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Accepted Solution

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snoegler earned 100 total points
ID: 1415328
Usually you do this in the handler for WM_INITDIALOG. At this point ( after calling the default
window procedure) all dialog items are valid, so you can set/change anything you want.
If you are using MFC, then put your initialization in the OnInitDialog() handler.
SDK Example:

LRESULT MyDlgProc(...)
{
  ...
  switch(message) {
    case WM_INITDIALOG:
      DefWindowProc(hWnd,message,wParam,lParam);
      // do initialization
      return TRUE;
    ...
   }
   ...
}

MFC example:

BOOL MyDlg::OnInitDialog()
{
  // ClassWizard generated stuff
  ...
  // do initialization here
  return TRUE;
}
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Author Comment

by:AndersCarlsson
ID: 1415329
I do´nt have my UpDownControl in a dialog box.
I use it in a "home made" control that can change a value by  the UD-control or by a graphic scale.
If i change the value by the graphic control and then clicks in the UpDown control it goes back to the previous value.
I can´t use the style UDS_SETBUDDYINT bacause the value is a decimal number (2 decimals), between 0.0 and 3.0.
The UD cntrl must have Max and Min values as int´s.
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Author Comment

by:AndersCarlsson
ID: 1415330
Sorry I forgot
I don´t get any WM_INITDIALOG message to my customcontrol
:>
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LVL 6

Expert Comment

by:snoegler
ID: 1415331
I see. You'll then have to do it like this:

1. Create your control
2. Send the UDM_ messages (like UDM_SETRANGE to set the min/max values) to the control
(the HWND is valid after calling CreateWindow ( or CSpinButton::Create )).
3. On each change of the edit(EN_CHANGE)  field you want the spinbutton to be associated
with, set the spin buttons position according to the value you have (UDM_SETPOS).

If you are using values between 0.0 and 3.0, and want to adjust them using the spin button
with 3 digits precision, then simply multiply by 100 : UDM_SETRANGE(0,300) and
set the acceleration using UDM_SETACCEL.
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