IMAPIControl::Activate
Applies to: Outlook 2013 | Outlook 2016
Performs a task such as displaying a dialog box or starting a programmatic operation when a client application user clicks the button control.
HRESULT Activate(
ULONG ulFlags,
ULONG_PTR ulUIParam
);
Parameters
ulFlags
[in] Reserved; must be zero.
ulUIParam
[in] A handle to the parent window of the dialog box on which the button control appears.
Return value
S_OK
The button control was successfully activated.
Remarks
The IMAPIControl::Activate method performs tasks following a user's click of the button control. After the click occurs, as part of the processing of the display table, MAPI makes a call to Activate after first calling IMAPIControl::GetState to determine whether the button is enabled.
For more information about how to implement Activate and the other IMAPIControl : IUnknown methods, see Control Object Implementation.