Error on SetWindowPos - winapi

Question

I'm trying to write simple code for changing an application (notepad) windows position. Notepad should be running in background (only 1 instance).
I am using Process::GetProcessesByName( "notepad") to get the process ID,
and myProcess->MainWindowHandle to get the notepad windows handle.
Now I am trying to change window size by passing the HWND handle to SetWindowPos,
I am not sure how to correctly do it (searched the web didn't find a clear newbie-answer)
1st I tried:
HWND hwnd = myProcess->MainWindowHandle;
SetWindowPos(hwnd ,
HWND_TOP,
100,
100,
0, 0, // Ignores size arguments.
SWP_NOSIZE);
This got me
Compile error: error C2440: 'initializing' : cannot convert from 'System::IntPtr' to 'HWND'
Then I tried casting and passing as reference:
HWND hwnd = (HWND)&myProcess->MainWindowHandle;
SetWindowPos(&hwnd ,
HWND_TOP,
100,
100,
0, 0, // Ignores size arguments.
SWP_NOSIZE);
}
Error:
Compile error: error C2664: 'SetWindowPos' : cannot convert parameter 1 from 'HWND *' to 'HWND'
See below for complete code:
#include "StdAfx.h"
#include <windows.h>
#include <iostream>
#include <string>
#using <System.dll>
using namespace System;
using namespace System::Diagnostics;
int main()
{
array<Process^>^myProcesses = Process::GetProcessesByName( "notepad");
if ( myProcesses->Length == 0 )
Console::WriteLine( "Could not find notepad processes on local computer." );
Collections::IEnumerator^ myEnum = myProcesses->GetEnumerator();
while ( myEnum->MoveNext() )
{
Process^ myProcess = safe_cast<Process^>(myEnum->Current);
Console::Write( "Process Name : {0} Process ID : {1} HandleCount : {2}\n", myProcess->ProcessName, myProcess->Id, myProcess->HandleCount );
Console::Write( "Main window Title : {0} MainWindowHandle : {1}", myProcess->MainWindowTitle, myProcess->MainWindowHandle );
//HWND hwnd = myProcess->MainWindowHandle; //1st try
// SetWindowPos(hwnd ,
// HWND_TOP,
// 100,
// 100,
// 0, 0, // Ignores size arguments.
// SWP_NOSIZE);
HWND hwnd = (HWND)&myProcess->MainWindowHandle;//2nd try
SetWindowPos(&hwnd ,
HWND_TOP,
100,
100,
0, 0, // Ignores size arguments.
SWP_NOSIZE);
}
}
}

Answer 1

you send an adress to first param of SetWindowsPos function but this function expect a HWND value. You know in C++ :
&variable = return adress of variable where is store the value
variable = return value of variable
Visual C++ Intellisense or tooltip give you prototype.
BOOL SetWindowsPos(HWND, HWND, int, int, int, int, UINT);
EDIT : as say in comment, this line :
HWND hwnd = (HWND)&myProcess->MainWindowHandle;
is wrong, you have to do :
HWND hwnd = (HWND)myProcess->MainWindowHandle.ToPointer();
ToPointer method documentation : http://msdn.microsoft.com/fr-fr/library/system.intptr.topointer(v=vs.110).aspx