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-netcf

  • Artikkeli

Sets the compiler to target the .NET Compact Framework.

Syntax

-netcf

Remarks

The -netcf option causes the Visual Basic compiler to target the .NET Compact Framework rather than the full .NET Framework. Language functionality that is present only in the full .NET Framework is disabled.

The -netcf option is designed to be used with -sdkpath. The language features disabled by -netcf are the same language features not present in the files targeted with -sdkpath.

Note

The -netcf option is not available from within the Visual Studio development environment; it is available only when compiling from the command line. The -netcf option is set when a Visual Basic device project is loaded.

The -netcf option changes the following language features:

  • The End <keyword> Statement keyword, which terminates execution of a program, is disabled. The following program compiles and runs without -netcf but fails at compile time with -netcf.

    Module Module1
    Sub Main()
        End   ' not valid to terminate execution with /netcf
    End Sub
End Module

  • Late binding, in all forms, is disabled. Compile-time errors are generated when recognized late-binding scenarios are encountered. The following program compiles and runs without -netcf but fails at compile time with -netcf.

    Class LateBoundClass
    Sub S1()
    End Sub

    Default Property P1(ByVal s As String) As Integer
        Get
        End Get
        Set(ByVal Value As Integer)
        End Set
    End Property
End Class

Module Module1
    Sub Main()
        Dim o1 As Object
        Dim o2 As Object
        Dim o3 As Object
        Dim IntArr(3) As Integer

        o1 = New LateBoundClass
        o2 = 1
        o3 = IntArr

        ' Late-bound calls
        o1.S1()
        o1.P1("member") = 1

        ' Dictionary member access
        o1!member = 1

        ' Late-bound overload resolution
        LateBoundSub(o2)

        ' Late-bound array
        o3(1) = 1
    End Sub

    Sub LateBoundSub(ByVal n As Integer)
    End Sub

    Sub LateBoundSub(ByVal s As String)
    End Sub
End Module

  • The Auto, Ansi, and Unicode modifiers are disabled. The syntax of the Declare Statement is also modified to Declare Sub|Function name Lib "library" [Alias "alias"] [([arglist])]. The following code shows the effect of -netcf on a compilation.

    ' compile with: /target:library
Module Module1
    ' valid with or without /netcf
    Declare Sub DllSub Lib "SomeLib.dll" ()

    ' not valid with /netcf
    Declare Auto Sub DllSub1 Lib "SomeLib.dll" ()
    Declare Ansi Sub DllSub2 Lib "SomeLib.dll" ()
    Declare Unicode Sub DllSub3 Lib "SomeLib.dll" ()
End Module

  • Using Visual Basic 6.0 keywords that were removed from Visual Basic generates a different error when -netcf is used. This affects the error messages for the following keywords:

    • Open

    • Close

    • Put

    • Print

    • Write

    • Input

    • Lock

    • Unlock

    • Seek

    • Width

    • Name

    • FreeFile

    • EOF

    • Loc

    • LOF

    • Line

Example

The following code compiles Myfile.vb with the .NET Compact Framework, using the versions of mscorlib.dll and Microsoft.VisualBasic.dll found in the default installation directory of the .NET Compact Framework on the C drive. Typically, you would use the most recent version of the .NET Compact Framework.

vbc -netcf -sdkpath:"c:\Program Files\Microsoft Visual Studio .NET 2003\CompactFrameworkSDK\v1.0.5000\Windows CE " myfile.vb

See also