MsgBox

http://www.jrsoftware.org/ishelp/index.php?topic=isxfunc_msgbox

ExpandConstant

http://www.jrsoftware.org/ishelp/index.php?topic=isxfunc_expandconstant

DelTree

http://www.jrsoftware.org/ishelp/index.php?topic=isxfunc_deltree

Event Functions

The Pascal script can contain several event functions which are called at appropriate times.

Setup event functions

Setup supports following event functions:

Uninstall event functions

Uninstall supports following event functions:

procedure CurUninstallStepChanged(CurUninstallStep: TUninstallStep);

Constants

Here‘s the list of constants used by these functions:

Pascal Script

原文：http://www.cnblogs.com/chucklu/p/6438610.html