Symantec WISESCRIPT PACKAGE EDITOR 8.0 - REFERENCE FOR WISE PACKAGE STUDIO V1.0 Reference page 125

WiseScript Package Editor Reference
Each .DLL function takes a single parameter (lpDllParams) that points to a structure
containing information that can be passed back and forth between the .DLL function
and the running installation script.
Variables Added
Because WiseScript-specific .DLL functions have access to the variable list of the
running installation, you can add new variables. List the names of the variables to
add, separated by commas. Do not use variables enclosed in %.
Parameter String
Use this to pass information to the .DLL function. Text you enter here is passed to
the .DLL in the IpszParam variable. This can include variables surrounded with %
signs.
Action
Select the installation's action when it returns from the .DLL call. The .DLL returns a
boolean value (zero equals false, non-zero equals true).
Ignore return value
The script continues regardless of any value returned.
Exit if function returns true
The installation exits if the .DLL function returns non-zero.
Start block if function returns true
If the .DLL function returns non-zero, all actions between this action and its
matching End action are executed. Otherwise these actions are skipped.
Loop while function returns true
The actions between this action and the matching End action (including the .DLL
call) are executed repeatedly until the .DLL function returns zero.
Perform while loop at least once.
If you select Loop while function returns true, mark this to force the loop to
execute once before the test is performed. If the check box is cleared, the loop is
executed if the condition is true, but is not executed if the condition is false.
Call a function with variable parameter list
(Enables the options below.) Mark this to call .DLLs not specifically written for
WiseScript. These .DLLs cannot access any of the installation's internal variables,
but you can pass this information to them. Below, specify the required parameters
and Return Value Type.
Return Value Type
Select the data type of the return value, which are described in
Settings.
Returned Variable
Select or enter a variable to store the returned value.
Get Last Error Variable
When you call a Windows API function that uses the GetLastError() function to
report errors, select a variable to hold the return value of that function. Doing so
ensures that GetLastError() is called immediately following your function to prevent
problems that can occur when you debug the WiseScript.
Keep DLL loaded in memory after returning from function
By default, the Call DLL Function action loads a .DLL, calls a function in that .DLL,
and then unloads the .DLL. If you call many functions from a certain .DLL, then the
unload is unnecessary and can cause problems with certain .DLLs. To leave this .DLL
loaded, check this check box.
WiseScript Actions
DLL Parameter
125