true if the character should be sent directly to the ActiveX control and not preprocessed; otherwise, false.
The AxHost.IsInputChar(char) method is called during window message preprocessing to determine whether the given input character should be preprocessed or sent directly to the ActiveX control. The preprocessing of a character includes checking whether the character is a mnemonic of another control.
As implemented in the System.Windows.Forms.AxHost class, the AxHost.IsInputChar(char) method always returns true, so the specified character is sent directly to the ActiveX control.