HELPMSGSTRING
A common
dialog box sends the HELPMSGSTRING registered message to the window procedure
of its owner window when the user clicks the Help button.
For
Explorer-style Open and Save As dialog boxes, this message has been superseded
by the CDN_HELP
notification message.
MessageID = RegisterWindowMessage(HELPMSGSTRING);
hdlg = (HWND) wParam;
lpStruct = (LPVOID) lParam;
Parameters
hdlg
Handle of the
common dialog box.
lpStruct
Pointer to
the initialization structure for the common dialog box. This structure can be a
CHOOSECOLOR,
CHOOSEFONT,
FINDREPLACE,
OPENFILENAME,
PRINTDLG or
PAGESETUPDLG
structure.
Return Values
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.
See Also