在Windows API中使用C#托管结构/类

我厌倦了使用

Marshal.Copy

，

Marshal.Read*

和

Marshal.Write*

，所以我想知道是否有办法强制强制强制强制转换非托管内存指针（类型为

IntPtr

）

大概是这样的：

IntPtr pointer = Marshal.AllocateHGlobal(sizeof(Foo));
Foo bar = (Foo)pointer;
bar.fooBar = someValue;
// call some API
Marshal.FreeHGlobal(pointer);
bar = null; // would be necessary?

我相信你在追我。此处的示例代码演示了以下用法：

Point p;
p.x = 1;
p.y = 1;

Console.WriteLine("The value of first point is " + p.x +
                  " and " + p.y + ".");

// Initialize unmanged memory to hold the struct.
IntPtr pnt = Marshal.AllocHGlobal(Marshal.SizeOf(p));

try
{

    // Copy the struct to unmanaged memory.
    Marshal.StructureToPtr(p, pnt, false);

    // Create another point.
    Point anotherP;

    // Set this Point to the value of the 
    // Point in unmanaged memory. 
    anotherP = (Point)Marshal.PtrToStructure(pnt, typeof(Point));

    Console.WriteLine("The value of new point is " + anotherP.x +
                      " and " + anotherP.y + ".");

}
finally
{
    // Free the unmanaged memory.
    Marshal.FreeHGlobal(pnt);
}

---

@Jean-Pierre Chauvel：注意，您还可以在P/Invoke方法的声明中使用结构。元帅会为你做所有必要的转换，我知道。但是我需要将DeviceIoControl与大量不同的结构类型一起使用。