如何判断Windows资源管理器来更新其图标?
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20-09-2019 - |
题
在我的安装程序完成安装我的应用程序的EXE的新版本,我想告诉浏览器使用新的exe文件的图标,其快捷方式。然而,我无法弄清楚如何做到这一点。
从网上阅读,它看起来像问题是,系统图像列表是缓存旧版本的图标。我试着打电话给 SHChangeNotify 与SHCNE_UPDATEIMAGE
参数。我打过电话 SHUpdateImage 。我甚至尝试广播大锤方法WM_SETTINGCHANGE
。似乎没有任何工作。
这是完全可能的,我只是在做一些错误。任何帮助,将不胜感激。
警告:非常难看的测试代码如下
#if 1
// First attempt: using shell functions
wchar_t icon_path[MAX_PATH];
int icon_index;
UINT icon_flags;
IShellFolder *desktop_folder;
IShellFolder *sub_folder;
IExtractIcon *extract_icon;
LPITEMIDLIST pidl;
SHGetDesktopFolder(&desktop_folder);
wchar_t *folder_path = L"C:\\Documents and Settings\\All Users\\Start Menu\\Programs\\MyCompany\\";
desktop_folder->ParseDisplayName(NULL, NULL, folder_path, NULL, &pidl,
NULL);
desktop_folder->BindToObject(pidl, NULL, IID_IShellFolder,
(void**) &sub_folder);
sub_folder->ParseDisplayName(NULL, NULL, L"MyApp.lnk", NULL, &pidl,
NULL);
sub_folder->GetUIObjectOf(NULL, 1, (LPCITEMIDLIST*) &pidl,
IID_IExtractIcon, NULL, (void**) &extract_icon);
extract_icon->GetIconLocation(0, icon_path, MAX_PATH,
&icon_index, &icon_flags);
SHFILEINFO sfi;
DWORD_PTR result = SHGetFileInfo(shortcut_path, 0, &sfi, sizeof(sfi),
SHGFI_SYSICONINDEX | SHGFI_LARGEICON);
SHUpdateImage(icon_path, icon_index, icon_flags, sfi.iIcon);
// sfi.iIcon should be correct, but we'll try both, just for fun...
SHChangeNotify(SHCNE_UPDATEIMAGE, SHCNF_DWORD, NULL,
(LPCVOID) icon_index);
SHChangeNotify(SHCNE_UPDATEIMAGE, SHCNF_DWORD, NULL,
(LPCVOID) sfi.iIcon);
#else
// Second attempt: broadcasting a settings change
HKEY reg;
RegCreateKeyEx(HKEY_CURRENT_USER,
L"Control Panel\\Desktop\\WindowMetrics", 0, NULL, 0,
KEY_SET_VALUE, NULL, ®, NULL);
DWORD value;
value = 33;
RegSetValueEx(reg, L"Shell Icon Size", 0, REG_DWORD, (BYTE*) &value,
sizeof(value));
value = 32;
SendMessage(HWND_BROADCAST, WM_SETTINGCHANGE, SPI_SETNONCLIENTMETRICS,
(int) L"WindowMetrics");
RegSetValueEx(reg, L"Shell Icon Size", 0, REG_DWORD, (BYTE*) &value,
sizeof(value));
SendMessage(HWND_BROADCAST, WM_SETTINGCHANGE, SPI_SETNONCLIENTMETRICS,
(int) L"WindowMetrics");
#endif
解决方案
您大锤的做法是我见过用来完成这件事的人。尽管在你的代码的糟糕,“壳牌图标大小”值是REG_SZ
,而不是一个REG_DWORD
。总是VERIFY()API函数返回值...
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