Winapi SetWindowPos上的错误

我正在尝试编写更改应用程序记事本windows位置的简单代码。记事本只能在后台运行1个实例

我正在使用Process:：GetProcessByName记事本获取进程ID， 和myProcess->MainWindowHandle获取记事本窗口句柄

现在我试图通过将HWND句柄传递给SetWindowPos来更改窗口大小

我不知道如何正确地做它搜索网页没有找到一个明确的新手答案

首先，我尝试：

HWND hwnd =  myProcess->MainWindowHandle;
             SetWindowPos(hwnd , 
                 HWND_TOP, 
                 100, 
                 100, 
                 0, 0,          // Ignores size arguments. 
                 SWP_NOSIZE); 

这让我抓狂

Compile error:  error C2440: 'initializing' : cannot convert from 'System::IntPtr' to 'HWND'

然后我试着投球和传球作为参考：

HWND hwnd =  (HWND)&myProcess->MainWindowHandle;
SetWindowPos(&hwnd , 
         HWND_TOP, 
         100, 
         100, 
         0, 0,          // Ignores size arguments. 
         SWP_NOSIZE); 

       }

错误：

Compile error:  error C2664: 'SetWindowPos' : cannot convert parameter 1 from 'HWND *' to 'HWND'

完整代码见下文：

#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); 

               }
      }   
}

---

向SetWindowsPos函数的第一个参数发送地址，但此函数需要HWND值。你在C++中知道：

&变量=存储值的变量的返回地址 变量=变量的返回值

VisualC++智能工具或工具提示给你原型。

BOOL SetWindowsPos(HWND, HWND, int, int, int, int, UINT);

编辑：如注释中所述，此行：

HWND hwnd = (HWND)&myProcess->MainWindowHandle;

如果错误，您必须执行以下操作：

HWND hwnd = (HWND)myProcess->MainWindowHandle.ToPointer();

---

ToPointer方法文档：

HWND HWND=HWNDmyProcess->MainWindowHandle.ToPointer；当然，在SetWindowPos调用中使用hwnd和not&hwnd，如@πντα所述ῥεῖSetWindowPoshwnd，删除&编译器错误非常明显