Hello
I don't have C++/CLI 2.0 reference handy and the code below was written
after long hours of research and shallow readings. From what I see, the code
works and looks logical to me. Can you please review it and tell me if I
overlooked something.
On the other hand, can you suggest a good C++/CLI 2.0 book for starters?
Code purpose: To use native EnumWindows() and have its callback handled
within any user created delegate.
[begin]
#include "stdafx.h"
using namespace System;
class EnumWindowsProcThunk;
public ref class MyClass
{
private:
EnumWindowsProcThunk *m_thunkEnumWindows;
public:
delegate bool delOnEnum(int h);
delOnEnum ^OnEnum;
void EnumWindows();
MyClass();
};
private class EnumWindowsProcThunk
{
private:
msclr::auto_gcroot<MyClass^m_clr;
public:
static BOOL CALLBACK fwd(
HWND hwnd,
LPARAM lParam);
EnumWindowsProcThunk(MyClass ^clr);
};
MyClass::MyClass()
{
OnEnum = nullptr;
m_thunkEnumWindows = new EnumWindowsProcThunk(this);
}
void MyClass::EnumWindows()
{
::EnumWindows(&EnumWindowsProcThunk::fwd, (LPARAM)(m_thunkEnumWindows));
}
EnumWindowsProcThunk::EnumWindowsProcThunk(MyClass ^clr)
{
m_clr = clr;
}
BOOL CALLBACK EnumWindowsProcThunk::fwd(HWND hwnd,LPARAM lParam)
{
return static_cast<EnumWindowsProcThunk *>((void
*)lParam)->m_clr->OnEnum((int)hwnd) ? TRUE : FALSE;
}
ref class MyGUI
{
private:
public:
bool OnEnumHandler(int h)
{
Console::WriteLine("MyGUI: {0}", h);
return true;
}
};
int main(array<System::String ^^args)
{
MyClass ^mc = gcnew MyClass();
MyGUI ^g = gcnew MyGUI;
mc->OnEnum += gcnew MyClass::delOnEnum(g, &MyGUI::OnEnumHandler);
mc->EnumWindows();
return 0;
}
[end]
