无法获取任务管理器listview控件内容,我百思不得其解,请高手看看哪里有问题?
主要代码如下HWND hwnd, hListview, header;
hwnd = ::FindWindow(_T("#32770"),_T("Windows 任务管理器"));
hwnd = ::FindWindowEx(hwnd,0,_T("#32770"), _T("Processes"));
hListview = ::FindWindowEx(hwnd, 0, _T("SysListView32"), _T("进程"));
header = ::FindWindowEx(hListview, 0, _T("SysHeader32"), 0);
int rows = ::SendMessage(hListview, LVM_GETITEMCOUNT, 0, 0);
int cols = ::SendMessage(header, HDM_GETITEMCOUNT, 0, 0);
HANDLE hProcess;
LVITEM vItem, *pointer;
char ItemBuf[512], *pItem;
DWORD ThreadID, PID;
ThreadID = GetWindowThreadProcessId(hListview, &PID);
hProcess = OpenProcess(PROCESS_VM_OPERATION | PROCESS_VM_READ | PROCESS_VM_WRITE | PROCESS_QUERY_INFORMATION, FALSE, PID);
pointer = (LVITEM*)VirtualAllocEx(hProcess, NULL, sizeof(LVITEM), MEM_COMMIT, PAGE_READWRITE);
for (int i = 0; i < 1; i++)
{
//m_listctrl.InsertItem(i, _T(""));
for (int j = 0; j < 3; j++)
{
vItem.mask = LVIF_TEXT; //说明pszText是有效的
vItem.iItem = i; //行号
vItem.iSubItem = j; //列号
vItem.cchTextMax = 512; //所能存储的最大的文本为256字节
//LPWSTR pItem = NULL;
//申请内存空间
pItem = (char *)VirtualAllocEx(hProcess, NULL, 512, MEM_COMMIT, PAGE_READWRITE);
vItem.pszText = pItem;
WriteProcessMemory(hProcess, pointer, &vItem, sizeof(LVITEM), NULL);
::SendMessage(hListview, LVM_GETITEMW, (WPARAM)i, (LPARAM)pointer);
memset(ItemBuf, 0, 512);
ReadProcessMemory(hProcess, pItem, ItemBuf, 512, NULL);
CString str;
str.Format(_T("%s"), ItemBuf);
MessageBox(str);
//释放内存空间
//m_listctrl.SetItemText(i, j, str);
VirtualFreeEx(hProcess, pItem, 0, MEM_RELEASE);
}
}
VirtualFreeEx(hProcess, pointer, 0, MEM_RELEASE);
CloseHandle(hProcess);//关闭打开的进程对象
程序运行时得到的行数、列数都正确,但是MessageBox(str)弹窗弹出的信息都是空的是为什么?