GetProcAddress

[DllImport("coredll.dll", EntryPoint="GetProcAddressW", SetLastError=true)]

public static extern IntPtr GetProcAddress(IntPtr hModule, string procName);

Declare Function GetProcAddress Lib "Coredll"  Alias "GetProcAddressW"  _

static extern IntPtr GetProcAddress(IntPtr hModule, string procName);

Private Function GetProcAddress(ByVal hModule As IntPtr, ByVal procName As String) As UIntPtr

Private Declare Function GetProcAddress Lib "kernel32" (ByVal hModule As Integer, ByVal lpProcName As String) As Integer

[DllImport("KERNEL32.DLL", CharSet=CharSet::Ansi, EntryPoint="GetProcAddress", ExactSpelling=true)]

static IntPtr GetProcAddress(IntPtr hModule, String^ lpProcName);

static def GetProcAddress(hModule as IntPtr, procName as string) as IntPtr:

GetProcAddress only comes in an ANSI flavor, hence we help the runtime by telling it to always use ANSI when marshalling the string parameter. We also prevent the runtime looking for a non-existent GetProcAddressA, because the default for C# is to set ExactSpelling to false.

   internal static extern IntPtr GetProcAddress(IntPtr hModule, string procName );

IntPtr fptr = UnsafeNativeMethods.GetProcAddress( hModule, "DllRegisterServer" );

Some DLLs only export by ordinal. Because you can't express this mode of GetProcAddress to the marshaller, one possibility is to import the function a second time with another name, such as:

[DllImport("kernel32", SetLastError = true, EntryPoint = "GetProcAddress")]

static extern IntPtr GetProcAddressOrdinal(IntPtr hModule, IntPtr procName);

_pfnTest = (LPFNTEST)::GetProcAddress(hDLL, "Test");

    proc = GetProcAddress(GetModuleHandle("Kernel32.dll"), "IsWow64Process")

One may Get the SCARD_IO_REQUEST values which are defined as pointer to initialised data export in WinSCard.dll using the LoadLibrary and GetProcAddress pair.

private extern static IntPtr GetProcAddress(IntPtr handle, string

IntPtr pci = GetProcAddress(handle, "g_rgSCardT0Pci") ;