Desktop Functions:

   Smart Device Functions:

Show Recent Changes
Subscribe (RSS)
Misc. Pages
1` DF
Helpful Tools
Suggested Reading
Website TODO List
Download Visual Studio Add-In

ByVal (coredll)

coredll is for smart devices, not desktop Windows. Therefore, this information only applies to code using the .NET Compact Framework. To see if information for ByVal in other DLLs exists, click on Find References to the right.

ByVal is a VB keyword that specifies a variable to be passed as a parameter BY VALUE. In other words, if the function or sub changes the value of the internal variable, it does not change the value of the external variable that was passed to it.

C# Signature:

[DllImport("coredll.dll", SetLastError=true)]
static extern TODO ByVal(TODO);

VB Signature:

Declare Function ByVal Lib "coredll.dll" (TODO) As TODO

User-Defined Types:


Alternative Managed API:

Do you know one? Please contribute it!


To pass a variable by reference (i.e. change the external variable to whatever value is set inside the function/sub) use ByRef before the parameter name.

Tips & Tricks:

Please add some!

Sample Code:

Please add some!

ByVal on MSDN

Please edit this page!

Do you have...

  • helpful tips or sample code to share for using this API in managed code?
  • corrections to the existing content?
  • variations of the signature you want to share?
  • additional languages you want to include?

Select "Edit This Page" on the right hand toolbar and edit it! Or add new pages containing supporting types needed for this API (structures, delegates, and more).

Access directly from VS:
Terms of Use
Edit This Page
Find References
Show Printable Version