2003服务器

Question

在Windows Server 2003上运行以下代码时，GetOpenFileName常用对话框初始化时会出现间歇性减速。启动时间约为30秒左右。下面的代码是一个临时程序，我用它来举例说明我在我的大项目中遇到的问题，但两者都存在问题。

一个重要的注意事项是，当网络接口全部被禁用时，初始化所需的时间更接近正常 - 通常为~2秒。一旦再次启用它们，问题就会恢复。

我已经将初始化时间与其他具有文件打开常用对话框（如记事本）的程序相对应，这些对话框没有相同的问题，无论是否启用了网络接口。

代码：

getNewFileName.h：

#define _tWinMain wWinMain

#include "windows.h"
#include <string>
#include "resource.h"
using std::wstring;

#define ISOLATION_AWARE_ENABLED 1
#if defined _M_IX86
#pragma comment(linker,"/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='X86' publicKeyToken='6595b64144ccf1df' language='*'\"")
#elif defined _M_IA64
#pragma comment(linker,"/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='ia64' publicKeyToken='6595b64144ccf1df' language='*'\"")
#elif defined _M_X64
#pragma comment(linker,"/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='amd64' publicKeyToken='6595b64144ccf1df' language='*'\"")
#else
#pragma comment(linker,"/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'\"")
#endif 

getNewFileName.cpp：

#include "getNewFileName.h"

HINSTANCE           hInst;
BOOL                InitInstance(HINSTANCE);
HWND                hWnd;
wstring             lastfile;
BOOL                getNewFileName(HWND owner, wstring title, wstring defaultfile, LPWSTR filetypes, OPENFILENAME &ofn, wstring lastdir, wstring lastfile, int mode, wstring extension);

int APIENTRY _tWinMain(HINSTANCE hInstance,
    HINSTANCE hPrevInstance,
    LPTSTR    lpCmdLine,
    int       nCmdShow)
{
    UNREFERENCED_PARAMETER(hPrevInstance);
    UNREFERENCED_PARAMETER(lpCmdLine);

    MSG msg;
    HACCEL hAccelTable;

    if (!InitInstance (hInstance))
    {
        return FALSE;
    }

    hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDR_ACCELERATOR1));

    // Main message loop:
    while (GetMessage(&msg, NULL, 0, 0))
    {
        if (!TranslateAccelerator(hWnd, hAccelTable, &msg))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
    }

    return (int) msg.wParam;
}

BOOL InitInstance(HINSTANCE hInstance)
{
    hInst = hInstance;
    OPENFILENAME ofn;
    wstring newfn;
    hWnd = CreateWindow(NULL, L"test", NULL,
        0, 0, 0, 0, NULL, NULL, hInst, NULL);
    BOOL ret = getNewFileName(hWnd, L"test", L"*.xml", L"XML Files\0*.xml\0", ofn, L"C:\\", lastfile, 1, L"xml");
    if (ret) { 
        newfn = ofn.lpstrFile;
        MessageBox(hWnd,newfn.c_str(),L"test",MB_OK);
    }
    ExitProcess(0);
    return TRUE;
}

void addPrefix(wstring &path) {
    wstring test = path.substr(0,4);
    if (path.substr(0,8) == L"\\\\?\\UNC\\" || path.substr(0,4) == L"\\\\?\\") { return; }
    wstring prefix = path.substr(0,2);
    if (prefix.compare(L"\\\\") == 0) { path.assign(L"\\\\?\\UNC\\"+path.substr(2,wstring::npos)); } else { path.assign(L"\\\\?\\"+path); }
    return;
}

UINT_PTR CALLBACK OFNHookProc(HWND hdlg, UINT uiMsg, WPARAM wParam, LPARAM lParam) {
    HICON hIcon;
    int width, height, xLeft, yTop;
    RECT rectToCenterOn, rectSubDialog;
    switch (uiMsg) {
    case WM_INITDIALOG:
        hIcon = LoadIcon(hInst, MAKEINTRESOURCE(IDI_PMMICO));
        SendMessage(GetParent(hdlg), WM_SETICON, ICON_BIG, (LPARAM)hIcon); 
        SendMessage(GetParent(hdlg), WM_SETICON, ICON_SMALL, (LPARAM)hIcon); 
        GetWindowRect(GetDesktopWindow(), &rectToCenterOn);
        GetWindowRect(GetParent(hdlg), &rectSubDialog);
        width = rectSubDialog.right-rectSubDialog.left;
        height = rectSubDialog.bottom-rectSubDialog.top;
        xLeft = rectToCenterOn.right / 2 - 
            (width) / 2;
        yTop = rectToCenterOn.bottom / 2 - 
            (height) / 2;
        BOOL test  = SetWindowPos(GetParent(hdlg), NULL, xLeft, yTop, width, height, SWP_NOSIZE);
        return (INT_PTR)FALSE;
        break;
    }
    return (INT_PTR)FALSE;
}

BOOL getNewFileName(HWND owner, wstring title, wstring defaultfile, LPWSTR filetypes, OPENFILENAME &ofn, wstring lastdir, wstring lastfile, int mode, wstring extension) {
    wstring lastdir_pre(lastdir);
    addPrefix(lastdir_pre);
    if (lastfile.compare(L"") == 0) { lastfile = defaultfile; }
    BOOL ret = false;
    wchar_t Buffer[30000];
    ofn.lStructSize = sizeof(OPENFILENAME);
    ofn.hwndOwner = owner;
    ofn.lpstrFile = Buffer;
    lastfile.copy(ofn.lpstrFile,lastfile.size(),0);
    ofn.lpstrFile[lastfile.size()] = '\0';
    ofn.nMaxFile = 30000;
    ofn.Flags = OFN_OVERWRITEPROMPT | OFN_ENABLEHOOK | OFN_EXPLORER;
    ofn.lpfnHook = OFNHookProc;
    ofn.lpstrFilter = filetypes;
    ofn.lpstrCustomFilter = NULL;
    ofn.nFilterIndex = 0;
    ofn.lpstrInitialDir = lastdir_pre.c_str();
    ofn.lpstrFileTitle = NULL;
    ofn.lpstrDefExt = extension.c_str();
    ofn.lpstrTitle = title.c_str();
    if (mode == 1) {
        ofn.Flags = ofn.Flags | OFN_PATHMUSTEXIST;
        ret = GetOpenFileName(&ofn); 
    } else if (mode == 2) {
        ret = GetSaveFileName(&ofn); 
    }
    if (ret == false) { ofn.lpstrFile[0] = '\0'; }
    return ret;
}