Ensures that the dlgitem is invisible when window is open. This function is specifically useful on the toolbar, since it automatically invokes a re-display of the toolbar, shifting the other toolbar buttons to the left to fill the space left by the button withdrawn (if the window is already open, you will see a momentary flash as this re-display takes place). If dlgitem does not refer to a list dialog item or a list tag (in outline lists), $ERROR is set and 0 is returned. Otherwise, 1 is returned.

The window parameter is a window identifier. dlgitem is the value of the control's id attribute.

Example

Withdraws the Equation toolbar button.