Visual Basic Reference
Unloads a form or control from memory.
The object placeholder is the name of a Form object or control array element to unload.
Unloading a form or control may be necessary or expedient in some cases where the memory used is needed for something else, or when you need to reset properties to their original values.
Before a form is unloaded, the Query_Unload event procedure occurs, followed by the Form_Unload event procedure. Setting the cancel argument to True in either of these events prevents the form from being unloaded. For MDIForm objects, the MDIForm object's Query_Unload event procedure occurs, followed by the Query_Unload event procedure and Form_Unload event procedure for each MDI child form, and finally the MDIForm object's Form_Unload event procedure.
When a form is unloaded, all controls placed on the form at run time are no longer accessible. Controls placed on the form at design time remain intact; however, any run-time changes to those controls and their properties are lost when the form is reloaded. All changes to form properties are also lost. Accessing any controls on the form causes it to be reloaded.
*Note* When a form is unloaded, only the displayed component is unloaded. The code associated with the form module remains in memory.
Only control array elements added to a form at run time can be unloaded with the Unload statement. The properties of unloaded controls are reinitialized when the controls are reloaded.