Dialogs

Types: Modal System modal Non modal (modeless)

MessageBox Four parameters: Parent window handle Message to show Title Flags

Modality MB_APPLMODAL (default) MB_SYSTEMMODAL MB_TASKMODAL

Buttons MB_ABORTRETRYIGNORE MB_CANCELTRYCONTINUE MB_OK MB_OKCANCEL MB_RETRYCANCEL MB_YESNO MB_YESNOCANCEL MB_HELP

Icons MB_ICONEXCLAMATION MB_ICONWARNING MB_ICONINFORMATION MB_ICONASTERISK MB_ICONQUESTION (not recommended) MB_ICONSTOP MB_ICONERROR MB_ICONHAND

Dialog window procedure Differences with window: BOOL instead LRESULT WM_INITDIALOG EndDialog

Modal dialog window After dialog window procedure is defined, dialog window can be created with functions DialogBox or DialogBoxParam. Dialog window has two handles: dialog window itself and parent window’s. DialogBoxParam creates a modal dialog box from a dialog box template resource. It has 5th argument, which is sent to dialog procedure as LPARAM parameter of the WM_INITDIALOG MESSAGE.

Indirect dialog window Functions DialogBoxIndirect or DialogBoxIndirectParam creates a modal box from a dialog box template DLGTEMPLATE(EX) structure DLGITEMTEMPLATE(EX) structure let define individual dialog window

DLGTEMPLATE

With class WNDCLASS structure can be used to define dialog: wnd.cbWndWxtra = DLGWINDOWEXTRA; Register as simple window

Message loop IsDialogMessage is function used to modify message loop for modeless (not necessarily) dialog boxes