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Windows and Window Controls That Signal Events

The following table defines the events signaled by windows and controls.

Window/Control

Signals These Events

Window or Dialog box

OPEN

 

CLOSE

 

ACTIVATE

 

DEACTIVATE

Single-line entry field

CHANGED

 

GAIN FOCUS

 

LOSE FOCUS

Multiline entry field

CHANGED

 

GAIN FOCUS

 

LOSE FOCUS

Check box

CHANGED

 

GAIN FOCUS

 

LOSE FOCUS

Radio button group

CHANGED

 

GAIN FOCUS

 

LOSE FOCUS

Combination box group

CHANGED

 

GAIN FOCUS

 

LOSE FOCUS

List box

CLICK

 

DOUBLE-CLICK

 

SCROLL BOTTOM

 

SCROLL TOP

 

GAIN FOCUS

 

LOSE FOCUS

List box field

CLICK

 

DOUBLE-CLICK

 

GAIN FOCUS

 

LOSE FOCUS

Bitmap or icon

CLICK

 

DOUBLE-CLICK

Drop-down list, enterable

CHANGED

 

GAIN FOCUS

 

LOSE FOCUS

Drop-down list, non-enterable

CHANGED

 

GAIN FOCUS

 

LOSE FOCUS

Non-drop-down list, enterable

CHANGED

 

GAIN FOCUS

 

LOSE FOCUS

Push button

CLICK

Menu item (lowest level)

CLICK

OLE embedded area

GAIN FOCUS

 

LOSE FOCUS

OLE control

GAIN FOCUS

 

LOSE FOCUS