true if the key event occurs as part of a composition session, i.e., after a compositionstart event and before the corresponding compositionend event. The un-initialized value of this attribute MUST be false.

public bool IsComposing { get; }

Public ReadOnly Property IsComposing As Boolean
	Get

public:
property bool IsComposing {
	bool get ();
}

member IsComposing : bool with get