Using a 32bit or 64bit dll in C# DllImport

by

I’ve found the simplest way to do this is to import the two methods with different names, and calling the right one. The DLL won’t be loaded until the call is made so it’s fine:

[DllImport("MyDll32.dll", EntryPoint = "Func1", CallingConvention = CallingConvention.Cdecl)]
private static extern int Func1_32(int var1, int var2);

[DllImport("MyDll64.dll", EntryPoint = "Func1", CallingConvention = CallingConvention.Cdecl)]
private static extern int Func1_64(int var1, int var2);

public static int Func1(int var1, int var2) {
    return IntPtr.Size == 8 /* 64bit */ ? Func1_64(var1, var2) : Func1_32(var1, var2);
}

Of course, if you have many imports, this can be become quite cumbersome to maintain manually.

More Related Contents:

  1. Win32 API function to programmatically enable/disable device
  2. Microsoft.Jet.OLEDB.4.0′ provider is not registered on the local machine
  3. Working example of CreateJobObject/SetInformationJobObject pinvoke in .net?
  4. Bring a window to the front in WPF
  5. Best way to access COM objects from C#
  6. Unblock File from within .net 4 c#
  7. No console output when using AllocConsole and target architecture x86
  8. File getting copied to SysWOW64 instead of System32
  9. How do I pinvoke to GetWindowLongPtr and SetWindowLongPtr on 32-bit platforms?
  10. Capture screen on server desktop session
  11. Add offset to IntPtr
  12. BadImageFormatException when loading 32 bit DLL, target is x86
  13. Change keyboard layout from C# code with .NET 4.5.2
  14. Options for using System.Data.SQLite in a 32bit and 64bit C# world
  15. How to pass a nullable type to a P/invoked function [duplicate]
  16. Target 32 Bit or 64 Bit native DLL depending on environment
  17. Is there a tool that generates P/Invoke signatures for arbitrary unmanaged DLL?
  18. Synchronizing 2 processes using interprocess synchronizations objects – Mutex or AutoResetEvent
  19. How to dynamically load and unload a native DLL file?
  20. Why does Math.Exp give different results between 32-bit and 64-bit, with same input, same hardware
  21. How do I calculate someone’s age based on a DateTime type birthday?
  22. Cast List to List
  23. how to create an animated gif in .net
  24. Windows Forms Splash Screen – Show a form while loading main form
  25. Extending an enum via inheritance
  26. How do I automatically display all properties of a class and their values in a string? [duplicate]
  27. RegEx for an IP Address
  28. Show line number in exception handling
  29. Return to an already open application when a user tries to open a new instance
  30. How do I convert a decimal to an int in C#?

Leave a Comment