include different headers for cases - c++-cli

Question

Is it possible to use for case 1 one header and for case 2 another?
Because when I use both headers in program I've got ambiguous symbol errors.
header 1(winapifunctions.h)
#include <Windows.h>
void CallWindowProc(String^ windowtitle)
{
};
header 2(classes.h)
using namespace System;
using namespace System::Collections::Generic;
public delegate void Super();
public ref class Event{};
public ref class MyException:public DivideByZeroException{};
public interface class IType{};
public interface class IVal{};
public ref class Writer abstract{};
public ref class Check: public Writer,public IType,public IVal
.....other classes
main program
#include "stdafx.h"
#include "classes.h"
#include "winapifunctions.h"
int main(array<System::String^>^ args)
{
//read x
switch(x){ case 1: {CallWindowProc("title");break;} case 2: { Check^ obj = gcnew Check();break;}
};
and error - IServiceProvider:ambiguous symbol

Answer 1

Short answer: No.
Long answer: includes are processed by the pre-processor, during compile time, while your case statements are processed during runtime. There's no way to make a compile-time thing to happen during runtime.
What are you trying to achieve exactly?

Answer 2

You can work around this problem using the following code:
// 1.cpp
case 1:
DoCase1();
break;
case 2:
DoCase2();
break;
// 2.cpp
#include <Windows.h>
void DoCase1()
{
// ...
}
// 3.cpp
#include <AnotherHeader.h>
void DoCase2()
{
// ...
}
If you would post more code and exact error messages, perhaps a better solution can be found.