When a program calls an unloaded DLL, the value of this variable determines whether the runtime attempts to find the DLL in the Windows and System folders. When set to the default value 1 (on, true, yes), the runtime looks in the Windows and System folders. When set to 0 (off, false, no) the runtime does not look in the Windows and System folders. See Working with Windows Technologies in A Guide to Interoperating with ACUCOBOL-GT for more details about calling DLLs.