REFERENCE GUIDE

LBN_SELCHANGEThis code specifies that the selection in a list box has changed. Thecontrol's parent window receives this code through a WM_ COMMANDmessage from the control.Parameters wParam Contains the wParam parameter of the WM_ COMMANDmessage, and specifies the control ID.CommentsIParamContains a list-box window handle in its low-order word andthe LBN_SELCHANGE code in its high-order word.This code applies only to list-box controls that have LBS_NOTIFY style.This code is sent when the list box receives input focus. The control'sparent window receives this code through a WM_ COMMAND messagefrom the control.Parameters wParam Specifies the control ID of the list box.IParam3.0Contains the list-box window handle in its low-order word andthe LBN_SETFOCUS code in its high-order word.This message is sent when a window becomes active or inactive.Parameters wParam Specifies the new state of the window. The wParam parameteris zero if the window is inactive; it is one of the followingnonzero values if the window is being activated:Value12MeaningThe window is being activated through some methodother than a mouse click (for example, through a call tothe Set-ActiveWindow function or selection of thewindow by the user through the keyboard interface).The window is being activated by a mouse click by theuser. Any mouse button can be clicked: right, left, ormiddle.Chapter 6, Messages directory639