This overridable function is called when the value in the window must be
transferred to the validator. Return FALSE if there is a problem.
\membersection{wxValidator::TransferToWindow}\label{wxvalidatortransfertowindow}
This overridable function is called when the value in the window must be
transferred to the validator. Return FALSE if there is a problem.
\membersection{wxValidator::TransferToWindow}\label{wxvalidatortransfertowindow}