Hidden property
Available for Header objects.
Read/Write at design time
Specifies whether the control is intended to be hidden. It can be one of the following values:
TRUE The Header control is intended to be hidden.
FALSE The Header control is not intended to be hidden (default).
REMARKS: This property DOES NOT hide the control. Instead, when
you send the HDM_LAYOUT message to a Header control with the
Hidden property set to TRUE, the control returns zero
in the cy member of the WINDOWPOS structure. You would then hide the
control by setting its height to zero. This can be useful when you want to use the control as an information
container instead of a visual control.