如何使用Win32操作现有桌面快捷方式的图标?

问题描述

我希望能够获取用于快捷方式的当前.ico文件，然后将其临时更改为其他.ico文件.我本来打算手动解析.lnk文件，但我想我可能会先要求一种更简单的方法.

I want to be able to get the current .ico file being used for a shortcut and then change it to a different .ico file temporarily. I was planning on parsing the .lnk files manually, but I thought I might ask for an easier way here first.

推荐答案

使用 IShellLink 接口.这是来自MSDN的示例:

Use the IShellLink interface. Here are examples from MSDN:

Shell链接

// CreateLink - Uses the Shell's IShellLink and IPersistFile interfaces
//              to create and store a shortcut to the specified object.
//
// Returns the result of calling the member functions of the interfaces.
//
// Parameters:
// lpszPathObj  - Address of a buffer that contains the path of the object,
//                including the file name.
// lpszPathLink - Address of a buffer that contains the path where the
//                Shell link is to be stored, including the file name.
// lpszDesc     - Address of a buffer that contains a description of the
//                Shell link, stored in the Comment field of the link
//                properties.

#include "stdafx.h"
#include "windows.h"
#include "winnls.h"
#include "shobjidl.h"
#include "objbase.h"
#include "objidl.h"
#include "shlguid.h"

HRESULT CreateLink(LPCWSTR lpszPathObj, LPCSTR lpszPathLink, LPCWSTR lpszDesc)
{
    HRESULT hres;
    IShellLink* psl;

    // Get a pointer to the IShellLink interface. It is assumed that CoInitialize
    // has already been called.
    hres = CoCreateInstance(CLSID_ShellLink, NULL, CLSCTX_INPROC_SERVER, IID_IShellLink, (LPVOID*)&psl);
    if (SUCCEEDED(hres))
    {
        IPersistFile* ppf;

        // Set the path to the shortcut target and add the description.
        psl->SetPath(lpszPathObj);
        psl->SetDescription(lpszDesc);

        // Query IShellLink for the IPersistFile interface, used for saving the
        // shortcut in persistent storage.
        hres = psl->QueryInterface(IID_IPersistFile, (LPVOID*)&ppf);

        if (SUCCEEDED(hres))
        {
            WCHAR wsz[MAX_PATH];

            // Ensure that the string is Unicode.
            MultiByteToWideChar(CP_ACP, 0, lpszPathLink, -1, wsz, MAX_PATH);

            // Add code here to check return value from MultiByteWideChar
            // for success.

            // Save the link by calling IPersistFile::Save.
            hres = ppf->Save(wsz, TRUE);
            ppf->Release();
        }
        psl->Release();
    }
    return hres;

// ResolveIt - Uses the Shell's IShellLink and IPersistFile interfaces
//             to retrieve the path and description from an existing shortcut.
//
// Returns the result of calling the member functions of the interfaces.
//
// Parameters:
// hwnd         - A handle to the parent window. The Shell uses this window to
//                display a dialog box if it needs to prompt the user for more
//                information while resolving the link.
// lpszLinkFile - Address of a buffer that contains the path of the link,
//                including the file name.
// lpszPath     - Address of a buffer that receives the path of the link
                  target, including the file name.
// lpszDesc     - Address of a buffer that receives the description of the
//                Shell link, stored in the Comment field of the link
//                properties.

#include "stdafx.h"
#include "windows.h"
#include "shobjidl.h"
#include "shlguid.h"
#include "strsafe.h"

HRESULT ResolveIt(HWND hwnd, LPCSTR lpszLinkFile, LPWSTR lpszPath, int iPathBufferSize)
{
    HRESULT hres;
    IShellLink* psl;
    WCHAR szGotPath[MAX_PATH];
    WCHAR szDescription[MAX_PATH];
    WIN32_FIND_DATA wfd;

    *lpszPath = 0; // Assume failure

    // Get a pointer to the IShellLink interface. It is assumed that CoInitialize
    // has already been called.
    hres = CoCreateInstance(CLSID_ShellLink, NULL, CLSCTX_INPROC_SERVER, IID_IShellLink, (LPVOID*)&psl);
    if (SUCCEEDED(hres))
    {
        IPersistFile* ppf;

        // Get a pointer to the IPersistFile interface.
        hres = psl->QueryInterface(IID_IPersistFile, (void**)&ppf);

        if (SUCCEEDED(hres))
        {
            WCHAR wsz[MAX_PATH];

            // Ensure that the string is Unicode.
            MultiByteToWideChar(CP_ACP, 0, lpszLinkFile, -1, wsz, MAX_PATH);

            // Add code here to check return value from MultiByteWideChar
            // for success.

            // Load the shortcut.
            hres = ppf->Load(wsz, STGM_READ);

            if (SUCCEEDED(hres))
            {
                // Resolve the link.
                hres = psl->Resolve(hwnd, 0);

                if (SUCCEEDED(hres))
                {
                    // Get the path to the link target.
                    hres = psl->GetPath(szGotPath, MAX_PATH, (WIN32_FIND_DATA*)&wfd, SLGP_SHORTPATH);

                    if (SUCCEEDED(hres))
                    {
                        // Get the description of the target.
                        hres = psl->GetDescription(szDescription, MAX_PATH);

                        if (SUCCEEDED(hres))
                        {
                            hres = StringCbCopy(lpszPath, iPathBufferSize, szGotPath);
                            if (SUCCEEDED(hres))
                            {
                                // Handle success
                            }
                            else
                            {
                                // Handle the error
                            }
                        }
                    }
                }
            }

            // Release the pointer to the IPersistFile interface.
            ppf->Release();
        }

        // Release the pointer to the IShellLink interface.
        psl->Release();
    }
    return hres;
}

在您的情况下，您将:

1. 创建IShellLink

查询IPersistFile()

调用IPersistFile.Load()设置.lnk文件名

调用IShellLink.Resolve()加载文件

调用IShellLink.SetIconLocation()设置新的.ico文件名

调用IPersistFile.Save()保存新的.lnk文件.

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