Question

just want to know how to add an spin control ( in another name, up/down control ) in the dialog box using C program (win32 / code::block / mingw compiler)

Answer 1

Simplest way is by using a resource editor to design your dialog. Code::Blocks doesn’t come with one, but ResEdit is one I’ve used.

If you are editing an .rc file by hand, you’d add a line similar to the following within the dialog definition section:

CONTROL         "", IDC_SPIN1, UPDOWN_CLASS, UDS_ARROWKEYS, 7, 22, 11, 14

If you want to add it programatically, you can do so through the CreateWindow API function, e.g.

HWND hwndUpDown = CreateWindow(UPDOWN_CLASS, NULL, 
                        WS_CHILD | WS_VISIBLE | UDS_ARROWKEYS,
                        7, 22, 11, 14, 
                        hwndDlg, NULL, hInst, NULL);

where the hwndDlg parameter is the HWND of your dialog window. A good place to call this is when you handle the WM_INITDIALOG message for the dialog.