IMAPIControl::Activate

Last modified: July 23, 2011

Applies to: Outlook

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
);

ulFlags

[in] Reserved; must be zero.

ulUIParam

[in] A handle to the parent window of the dialog box on which the button control appears.

S_OK

The button control was successfully activated.

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.

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