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PInvoke Sample (Call Unmanaged APIs) 

Visual Studio 2005

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This sample demonstrates how Visual J# can use the platform invoke services provided by the common language runtime to call unmanaged APIs. Platform invoke is an alternative to J/Direct® technology (J/Direct is fully supported by Visual J#) but uses .NET Framework inter-op attributes and .NET Framework data types to call into unmanaged APIs, instead of the @dll() directives and Java-language types used by J/Direct.

Security noteSecurity Note

This sample code is provided to illustrate a concept and should not be used in applications or Web sites, as it may not illustrate the safest coding practices. Microsoft assumes no liability for incidental or consequential damages should the sample code be used for purposes other than as intended.

Building and Running the Sample

To open the sample file in Solution Explorer

  1. Click Download Sample.

    The File Download message box appears.

  2. Click Open, and on the left column of the zip folder window, click Extract all files.

    The Extraction Wizard opens.

  3. Click Next. You can change the directory that the files will be extracted to, and then click Next again.

    Make sure that the Show extracted files check box is selected, and click Finish.

  4. Double-click the sample's .sln file.

    The sample solution is displayed in Solution Explorer. You might get a security warning that says the solution location is not trusted. Click OK to continue.

To build this sample

To run this sample:

  • From the development environment, press F5 to build and run the sample.


    From the command line, type PInvokeSample.exe.

Command-Line Requirements

For the Visual J# samples to function properly when building and running from the command line, you need to run vsvars.bat (located in the <%Program Files%>\Microsoft Visual Studio 8\Common7\Tools directory). Alternatively, you can also use the Visual Studio command prompt (click Start, then Programs, then Microsoft Visual Studio, and then Visual Studio Tools).

See Also