CODEWITHSUNDEEP
c#void-pointers
developer
developer

Reputation: 678

How to Marshal a void* function return type and parameter in C#?

I have a C function with prototype, void* VoidPointer(void*); Now I need to marshal it in C#(using DllImport). But I do not know how to mention the parameters in C# code.

I am new to C# and need to solve this asap ( in several attempts have got errors like this cannot convert from 'int' to 'System.IntPtr') Thanks.

Upvotes: 0

Views: 2352

Answers (1)

hcb
hcb

Reputation: 8357

c# supports void pointers. Just declare the function as

[DllImport("test.dll")]
public static extern unsafe void* VoidPointer(void* AValue);

public unsafe void Test()
{
    int* a;
    int b = 0;

    a = (int*)VoidPointer(&b);
}

(this only works if the void pointers are referencing integers ofcourse)

Upvotes: 2

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