c++ 获取桌面图标的坐标与名称

转载：https://www.cnblogs.com/iwana/p/13857583.html

https://www.cnblogs.com/strive-sun/p/13820834.html

#include<Windows.h>
#include<commctrl.h>
#include <stdio.h>
 
  
 
  
 
typedef struct tagLVITEM64A
{
UINT mask;
int iItem;
int iSubItem;
UINT state;
UINT stateMask;
INT64 pszText;
int cchTextMax;
int iImage;
LPARAM lParam;
#if (_WIN32_IE >= 0x0300)
int iIndent;
#endif
#if (_WIN32_WINNT >= 0x501)
int iGroupId;
UINT cColumns; // tile view columns
PUINT puColumns;
#endif
} LVITEM64A, *LPLVITEM64A;
 
 
void GetChromePT(HWND h)
{
 
DWORD dwProcessId;
HWND hDeskTop;
hDeskTop = ::FindWindow(L"progman", NULL);
hDeskTop = ::FindWindowEx(hDeskTop, 0, L"shelldll_defview", NULL);
hDeskTop = ::FindWindowEx(hDeskTop, 0, L"syslistview32", NULL); //获取桌面窗口bai句柄du;
GetWindowThreadProcessId(hDeskTop, &dwProcessId);//通过桌面窗口句柄获取此窗口所在进程的PID,其实就是explorer进程
HANDLE hProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, dwProcessId);//打开zhi指定PID进程,取得进程句柄
 
tagLVITEM64A *_lv,lvi;
LPVOID lpvPt = VirtualAllocEx(hProcess, NULL, sizeof(POINT), MEM_COMMIT, PAGE_READWRITE);//在指定进程里面申请一个POINI结构大小的空间.
 
_lv = (tagLVITEM64A*)VirtualAllocEx(hProcess, NULL, sizeof(tagLVITEM64A), MEM_COMMIT, PAGE_READWRITE);//在指定进程里面申请一个文本结构大小的空间.
 
 
char item[512] = { 0 };
char *_item;
POINT pt;
 
//获取窗口listbox 句柄  与 获取桌面图标信息无关 可忽略
HWND h_list = GetListHandle(h);
int m_iconCount = ListView_GetItemCount(hDeskTop);
_item = (char*)VirtualAllocEx(hProcess, NULL, 512, MEM_COMMIT, PAGE_READWRITE);
 
 
ZeroMemory(&lvi, sizeof(LVITEM));
//lv.mask = LVIF_TEXT;
lvi.cchTextMax = 512;
 
 
for (size_t i = 1; i < m_iconCount; i++)
{
//坐标
ListView_GetItemPosition(hDeskTop, i, lpvPt);//获取第一个图标的坐标,存入lpvPt
ReadProcessMemory(hProcess, lpvPt, &pt, sizeof(POINT), NULL);
//名称
lvi.iSubItem = 0;
lvi.pszText = (INT64)_item;
WriteProcessMemory(hProcess, _lv,&lvi,sizeof(LVITEM),NULL);
SendMessage(hDeskTop, LVM_GETITEMTEXT, (WPARAM)i, (LPARAM)_lv);
ReadProcessMemory(hProcess, _item, item, 512,NULL );
wchar_t pt_char[MAXBYTE] = { 0 };
//填充listbox
wsprintf(pt_char, L"%ld---%ld--name:%s", pt.x,pt.y, item); //一句话解决
SendMessage(h_list, LB_ADDSTRING, 0, (LPARAM)pt_char);
}
//lpvPt不是本进程里面的,不能使用,所以就要
//利用ReadProcessMemory从指定进程给读出来
VirtualFreeEx(hProcess, lpvPt, 0, MEM_RELEASE);
VirtualFreeEx(hProcess, _lv, 0, MEM_RELEASE);
VirtualFreeEx(hProcess, _item, 0, MEM_RELEASE);
//释放申请的空间
CloseHandle(hProcess);//关闭句柄
 
}

ListView_GetItemPosition : Gets the position of a list-view item

理论上获得桌面图标的正确方法是使用shell项，=> IFolderView::GetItemPosition

但是为了学习ListView_GetItemPosition的一些有用的知识，故写下来留作回顾。

---

 

因为我们要访问的桌面ListView与我们的应用程序存在的过程(Process)不同，所以我们所需要的POINT(由ListView_GetItemPosition提供)必须分配在拥有ListView的同一进程的地址空间中。

因此我们可以使用VirtualAllocEx()进行内存分配，然后使用该内存请求位置，然后使用ReadProcessMemory()将POINT数据从该内存读取到我们自己的进程中。

一些代码:

int numberOfIcons = ListView_GetItemCount(folderView);
printf("Number Of Icons On Desktop is: %d\n", numberOfIcons);

if (numberOfIcons > 0)
{
    DWORD pid = 0;
    GetWindowThreadProcessId(folderView, &pid);

    HANDLE hProcess = OpenProcess(PROCESS_VM_OPERATION | PROCESS_VM_READ, FALSE, pid);
    if (!hProcess)
    {
        printf("OpenProcess failed, error %u\n", GetLastError());
    }
    else
    {
        LPPOINT pt = (LPPOINT) VirtualAllocEx(hProcess, NULL, sizeof(POINT), MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
        if (!pt)
        {
            printf("VirtualAllocEx failed, error %u\n", GetLastError());
        }
        else
        {
            POINT iconPos;
            SIZE_T numRead;

            for (int i = 0; i < numberOfIcons; ++i)
            {
                if (!ListView_GetItemPosition(folderView, i, pt))
                {
                    printf("GetItemPosition failed for index %d\n", i);
                    continue;
                }

                if (!ReadProcessMemory(hProcess, pt, &iconPos, sizeof(POINT), &numRead))
                {
                    printf("ReadProcessMemory failed for index %d, error %u\n", i, GetLastError());
                    continue;
                }

                printf("Icon at Index %d, Position = %ld, %ld", i, iconPos.x, iconPos.y);
            }

            VirtualFreeEx(hProcess, pt, 0, MEM_RELEASE);
        }

        CloseHandle(hProcess);
    }
}

注：ListView_GetItemPosition不能保证桌面图标在listview控件中