向外部程序的ListView控件发送LVM_GETITEMTEXT

[swdraven]

如题，就是获取外部程序中的LISTVIEW中的内容，下面是我写的函数，结果是返回一大堆乱码，如"烫烫烫烫烫"
麻烦各位看看我的代码谢谢

void GetItem(HWND hwnd)
{
int iItem = 0;
LVITEM lvitem,*plvitem;
char ItemBuf[512], *pItem;
DWORD PID;
HANDLE hProcess;

hProcess = OpenProcess(PROCESS_ALL_ACCESS,FALSE,PID);
plvitem = (LVITEM*)VirtualAllocEx(hProcess,NULL,sizeof(LVITEM),MEM_COMMIT,PAGE_READWRITE);
pItem = (char*)VirtualAllocEx(hProcess,NULL,512,MEM_COMMIT,PAGE_READWRITE);
lvitem.cchTextMax = 512;
lvitem.iSubItem = 0;
lvitem.pszText = pItem;
WriteProcessMemory(hProcess,plvitem,&lvitem,sizeof(LVITEM),NULL);
::SendMessage(hwnd,LVM_GETITEMTEXT,(WPARAM)iItem,(LPARAM)plvitem);
ReadProcessMemory(hProcess,pItem,ItemBuf,512,NULL);
MessageBox(ItemBuf);
}

[cnzdgs]

hProcess = OpenProcess(PROCESS_ALL_ACCESS,FALSE,PID);
PID没有初始化。

[cnzdgs]

你用我之前写给你的代码来改。

[swdraven]

也试过，返回的是空值


CString CTestDlg::GetItem(HWND hwnd)
{
CString str;
DWORD processID = NULL;
GetWindowThreadProcessId(hwnd,&processID);
HANDLE process = ::OpenProcess(PROCESS_VM_OPERATION |PROCESS_VM_WRITE,FALSE,processID);
PVOID buffer = VirtualAllocEx(process,NULL,sizeof(LVITEM),MEM_COMMIT,PAGE_READWRITE);

LVITEM item;
WriteProcessMemory(process,buffer,&item,sizeof(LVITEM),NULL);
::SendMessage(hwnd,LVM_GETITEMTEXT,1,(LPARAM)buffer);
ReadProcessMemory(process,buffer,&item,sizeof(LVITEM),NULL);
str = item.pszText;
VirtualFreeEx(process,buffer,sizeof(LVITEM),MEM_DECOMMIT);
return str;
}

[cnzdgs]

bool GetLvItemText(HWND Lv, int Index, int SubItem, CString& Text)
{
	const int bufferLength = 4000;
	bool result = false;
	DWORD processId = NULL;
	GetWindowThreadProcessId(Lv, &processId);
	if (processId == NULL) return false;
	HANDLE process = ::OpenProcess(PROCESS_VM_OPERATION|PROCESS_VM_READ|PROCESS_VM_WRITE, FALSE, processId);
	if (process == NULL) return false;
	PVOID buffer = VirtualAllocEx(process, NULL, bufferLength, MEM_COMMIT, PAGE_READWRITE);
	if (buffer != NULL)
	{
		LPLVITEM item = (LPLVITEM)new BYTE[bufferLength];
		item->mask = LVIF_TEXT;
		item->iSubItem = SubItem;
		item->pszText = (LPTSTR)((PBYTE)buffer+sizeof(LVITEM));
		item->cchTextMax = (bufferLength - sizeof(LVITEM)) / sizeof(TCHAR);
		WriteProcessMemory(process, buffer, item, sizeof(LVITEM), NULL);
		if (SendMessage(Lv, LVM_GETITEMTEXT, Index, (LPARAM)buffer) != 0)
		{
			ReadProcessMemory(process, buffer, item, 1024, NULL);
			Text = (LPTSTR)((PBYTE)item+sizeof(LVITEM));
			result = true;
		}
		delete item;
		VirtualFreeEx(process, buffer, sizeof(LVITEM), MEM_DECOMMIT);
	}
	CloseHandle(process);
	return result;
}

[cnzdgs]

错了一点，更正：
ReadProcessMemory(process, buffer, item, 1024, NULL);
改为：
ReadProcessMemory(process, buffer, item, bufferLength, NULL);

[swdraven]

谢谢，真是高手~~~

老是麻烦你，我刚学MFC，其实我不想一有问题就上来问的，不过实在是不懂，

帮小弟指个路吧大哥，我应该怎么学才学得好呢？

[cnzdgs]

遇到问题先自己分析、调试，这样会有助于自身提高，有时候可能要多花一些时间。如果项目比较急，就要问别人了。
顺便提一下，你现在做的这个方面是Windows应用程序中比较深层的东西，没有人指导是很难实现的，所以你不会做也是很正常的。（通常的问题我是不会给出完整代码的）

[swdraven]

恩~~谢谢你