Issuing SET PROCEDURE TO without any file names closes all open procedure files. Use RELEASE PROCEDURE to close individual files.

When you execute a procedure, the procedure files are searched if the procedure isn't located in the currently executing program.

For more information about procedure files, see PROCEDURE Command and DO Command.

If a COM dynamic-link library (DLL) which uses SET PROCEDURE TO is instantiated more than once, the Init method of the second instance may fail with one of the following messages:

OLE error code 0x80004005: Unspecified error.

OLE error code 0x80020009: Exception occurred.

To instantiate an OLEPUBLIC class, Visual FoxPro must be able to find all the code for the class. There is an internal SET PROCEDURE/SET CLASSLIB to detect all the related code; if you try to change this setting, an error occurs. To prevent this, use SET PROCEDURE TO with the ADDITIVE keyword.

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