dev-cpp-users

[Dev-C++] C++ dialog control

[Chris S. <CS...@Ai...>]

I have created an OK pushbutton in a dialog box via a resource script =
(see code below):=20

****

    DEFPUSHBUTTON   "Start", ID_START_CALC, 255, 7, 50, 14
    DEFPUSHBUTTON   "OK", ID_OK, 255, 27, 50, 14
    DEFPUSHBUTTON   "Cancel", ID_CANCEL, 255, 47, 50, 14
****

I am trying to grey it out and disable it, from within a callback =
function, while I carry out some calculations, and then enable it again =
when the calcs are complete.=20

Does anyone know how to do this? I have tried SendDlgItemMessage with =
the dialog's handle, the pushbutton's ID and various LPARAMs and WPARAMs =
but with no success. I have also trawled www.msdn.microsoft.com but =
found no suggestions.=20

Regards=20
Chris Sroka=20

Re: [Dev-C++] C++ dialog control

[Kevin W. <ke...@me...>]

Hi everyone,

At 01:53 11/08/03, Chris Sroka wrote:

>I have created an OK pushbutton in a dialog box via a resource script (see 
>code below):
>
>****
>
>     DEFPUSHBUTTON   "Start", ID_START_CALC, 255, 7, 50, 14
>     DEFPUSHBUTTON   "OK", ID_OK, 255, 27, 50, 14
>     DEFPUSHBUTTON   "Cancel", ID_CANCEL, 255, 47, 50, 14
>****

There should only be one default button in a dialog box. Use PUSHBUTTON for 
the rest.

>I am trying to grey it out and disable it, from within a callback 
>function, while I carry out some calculations, and then enable it again 
>when the calcs are complete.

Buttons are windows, so you can send a message to the button to disable it, 
via the EnableWindow function:  EnableWindow(HWND hWnd, BOOL bEnable)
where hWnd is the window handle, and bEnable is set to FALSE to disable the 
window.

>Does anyone know how to do this? I have tried SendDlgItemMessage with the 
>dialog's handle, the pushbutton's ID and various LPARAMs and WPARAMs but 
>with no success. I have also trawled www.msdn.microsoft.com but found no 
>suggestions.

Do you have the Win32 SDK?

Regards,
         Kev.

RE: [Dev-C++] C++ dialog control

[Marc H. <ma...@e-...>]

Hi,
Use EnableWindow(HWND hWnd, BOOL bEnable) to enable and disable a window
(your button).
Use GetDlgItem(HWND hDlg, int nIDDlgItem) to get the HWND of the window
(button).

So,
	EnableWindow(GetDlgItem(hDlg, ID_OK), FALSE));

Where hDlg is the handle to the dialog, will disable the button.

Also, you should have only one DEFPUSHBUTTON, the one you want to be the
default button. The others should just be PUSHBUTTON.

__________________________________
Marc Heiligers
=A0
=A0
-----Original Message-----
From: dev...@li...
[mailto:dev...@li...] On Behalf Of Chris =
Sroka
Sent: 11 August 2003 02:54
To: dev...@li...
Subject: [Dev-C++] C++ dialog control


I have created an OK pushbutton in a dialog box via a resource script =
(see
code below):=20
****=20
=A0=A0=A0 DEFPUSHBUTTON=A0=A0 "Start", ID_START_CALC, 255, 7, 50, 14=20
=A0=A0=A0 DEFPUSHBUTTON=A0=A0 "OK", ID_OK, 255, 27, 50, 14=20
=A0=A0=A0 DEFPUSHBUTTON=A0=A0 "Cancel", ID_CANCEL, 255, 47, 50, 14=20
****=20
I am trying to grey it out and disable it, from within a callback =
function,
while I carry out some calculations, and then enable it again when the =
calcs
are complete.=20
Does anyone know how to do this? I have tried SendDlgItemMessage with =
the
dialog's handle, the pushbutton's ID and various LPARAMs and WPARAMs but
with no success. I have also trawled www.msdn.microsoft.com but found no
suggestions.=20
Regards=20
Chris Sroka=20