如果你想在推迟/提交/回滚的自定义操作中，访问一些其他的windows属性，可以将需要访问的属性传递给CustomActionData，然后获取CustomActionData的值。
下面是一个在推迟自定义操作中，访问windows安装属性SUPPORTDIR的例子：
1. 在Custom Actions and Sequences中创建一个set-a-property的自定义操作叫GetSUPPORTDIR。如下设置这个自定义操作，
? Property Name: DisplaySupportDir
? Property Value: [SUPPORTDIR]
? Install Exec Sequence: After InstallInitialize
2. 在InstallScript中，创建一个新的函数叫DisplaySupportDir。
function DisplaySupportDir(hMSI)
STRING supportDirPath;
NUMBER supportDirPathBuffer;
begin
supportDirPathBuffer = MAX_PATH;
if(MsiGetProperty(hMSI, "CustomActionData", supportDirPath, supportDirPathBuffer) == ERROR_SUCCESS) then
SprintfBox(INFORMATION,"Deferred Execution","The value of SUPPORTDIR is %s",supportDirPath);
SprintfBox(INFORMATION,"Deferred Execution","The value of InstallScript‘s SUPPORTDIR is %s",SUPPORTDIR);
endif;
end;
4. 在Custom Actions and Sequences中创建一个InstallScript的自定义操作叫DisplaySupportDir。如下设置这个自定义操作，
? Function Name: DisplaySupportDir? In-Script Execution: Deferred Execution in System Context
? Install Exec Sequence: After GetSUPPORTDIR
InstallSheild技术-->Accessing or Setting Windows Installer Properties,布布扣,bubuko.com
InstallSheild技术-->Accessing or Setting Windows Installer Properties