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## Declare Statement

Declare Sub procedurename Lib Libname$ [Alias aliasname$][(argument list)]

Declare Function procedurename Lib Libname$ [Alias aliasname$] [(argument list)][As Type]

- The Declare statement makes a reference to an external procedure in a Dynamic Link Library (DLL).

- The procedurename parameter is the name of the function or subroutine being called.

- The Libname parameter is the name of the DLL that contains the procedure.

- The optional Alias aliasname clause is used to supply the procedure name in the DLL if different from the name specified on the procedure parameter. When the optional argument list needs to be passed the format is as follows:

([ByVal] variable [As type] [,ByVal] variable [As type] ]…])

- The optional ByVal parameter specifies that the variable is [passed by value instead of by reference (see “ByRef and ByVal” in this manual). The optional As type parameter is used to specify the data type. Valid types are String, Integer, Double, Long, and Varaint (see “Variable Types” in this manual).

If a procedure has no arguments, use double parentheses () only to assure that no arguments are passed. For example:

Declare Sub OntTime Lib “Check” ()

Cypress Enable extentions to the declare statement. The following syntax is not supported by Microsoft Visual Basic.

Declare Function procedurename App [Alias aliasname$] [(argument list)][As Type]

This form of the Declare statement makes a reference to a function located in the executable file located in the application where Enable is embedded.

Related Topics: Call

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Example: