The name of the last EXIT or TRANSMIT key pressed.
EXIT and TRANSMIT keys are defined using the FORM SET or WINDOW SET ACCELERATOR commands.
Normally, a TRANSMIT key cannot terminate FORM INPUT while a “required” field has no value. However, if TRANSMIT key is pressed while the cursor is in a modified transmit field (or an “always transmit” field), the field will transmit, causing FORM INPUT to terminate. If, in these circumstances, there are still “required” fields in the form or display that do not contain values, the $Transmitkey will be set to the null string.
$Transmitkey can be reset at any time.