You can merge multiple preview files. To do this, you must first open the target file. Since write access is required, you must pass a "false" value for the second parameter, ReadOnly. Using the LlStgSysAppend() function you can then merge the files.
Visual Basic:
Dim hStgOrg As
Long
Dim hStgAppend As Long
hStgOrg =
LL.LlStgsysStorageOpen("C:\Test1.ll", "", False, True)
hStgAppend =
LL.LlStgsysStorageOpen("C:\Test2.ll", "", False, True)
LL.LlStgsysAppend
hStgOrg, hStgAppend
LL.LlStgsysStorageClose
hStgOrg
LL.LlStgsysStorageClose hStgAppend