HELPMSGSTRING message

A common dialog box sends the HELPMSGSTRING registered message to the window procedure of its owner window when the user clicks the Help button.

#define HELPMSGSTRING TEXT("commdlg_help")

Parameters

wParam

A handle to the common dialog box.

lParam

A pointer to the initialization structure for the common dialog box. This structure can be a CHOOSECOLOR, CHOOSEFONT, FINDREPLACE, OPENFILENAME, PRINTDLG or PAGESETUPDLG structure.

Return value

This message has no return value.

Remarks

You must specify the HELPMSGSTRING constant in a call to the RegisterWindowMessage function to get the identifier for the message sent by the dialog box.

When you create the dialog box, use the hwndOwner member of the initialization structure to identify the window to receive HELPMSGSTRING messages.

Requirements

Minimum supported client
Windows 2000 Professional [desktop apps only]
Minimum supported server
Windows 2000 Server [desktop apps only]
Header
Commdlg.h (include Windows.h)
Unicode and ANSI names
HELPMSGSTRINGW (Unicode) and HELPMSGSTRINGA (ANSI)

See also

Reference

CDN_HELP

CHOOSECOLOR

CHOOSEFONT

FINDREPLACE

OPENFILENAME

PRINTDLG

PAGESETUPDLG

RegisterWindowMessage

Conceptual

Common Dialog Box Library