Question

我在我的项目中运行来自单独项目的代码，当我下载并编译原始源代码时，它运行顺畅，但在我的内容中呕吐错误。我试图通过将变量类型转换为编译器预期的变量来修复错误，但这会导致CoCreateInstance和后续函数失败，从而导致我得出的结论是问题是我错过了使调用工作所需的代码，因此我搜索了原始资源，但我无法找到该代码。有人可以解释一下出了什么问题吗？我已经在这里待了4-5个小时。

错误是：

代码：

（https://pastebin.com/jffKKZAe完整代码，万一我错过了什么）

#include "stdafx.h"
#include <objbase.h>
#include <Windows.h>
#include <ntstatus.h>
#include <CommCtrl.h>
#include <shlobj.h>
#include <iostream>
#include <fci.h>
#include <fcntl.h>
#pragma comment(lib,"Ole32.lib")
#define T_CLSID_UninstallStringLauncher      L"{FCC74B77-EC3E-4DD8-A80B-008A702075A9}"
#define T_IID_IARPUninstallStringLauncher    L"{F885120E-3789-4FD9-865E-DC9B4A6412D2}"

BOOL ucmMasqueradedAPRLaunchFile(
    _In_ LPWSTR lpszFileGuid
)
{
    BOOL                         bCond = FALSE;
    HRESULT                      r = E_FAIL;
    IID                          xIID_IARPUninstallStringLauncher;
    CLSID                        xCLSID_IARPUninstallStringLauncher;
    IARPUninstallStringLauncher *USLauncher = NULL;

    do {

        if (lpszFileGuid == NULL)
            break;

        if (CLSIDFromString(T_CLSID_UninstallStringLauncher, &xCLSID_IARPUninstallStringLauncher) != NOERROR) {
            break;
        }
        if (IIDFromString(T_IID_IARPUninstallStringLauncher, &xIID_IARPUninstallStringLauncher) != S_OK) {
            break;
        }
        //Error in CoCreateInstance
        r = CoCreateInstance(&xCLSID_IARPUninstallStringLauncher, NULL,
            CLSCTX_INPROC_SERVER | CLSCTX_LOCAL_SERVER | CLSCTX_INPROC_HANDLER,
            &xIID_IARPUninstallStringLauncher, &USLauncher);

        if (r != S_OK)
            break;
        //Error here too
        r = ucmMasqueradedCoGetObjectElevate(T_CLSID_UninstallStringLauncher,
            CLSCTX_LOCAL_SERVER, &xIID_IARPUninstallStringLauncher, &USLauncher);
        if (r != S_OK)
            break;

        r = USLauncher->lpVtbl->LaunchUninstallStringAndWait(USLauncher, 0, lpszFileGuid, FALSE, NULL);

    } while (bCond);

    if (USLauncher != NULL) {
        USLauncher->lpVtbl->Release(USLauncher);
    }

    return SUCCEEDED(r);
}
BOOL ucmUninstallLauncherMethod(
    _In_ LPWSTR lpszExecutable
)
{
    BOOL        bResult = FALSE, bCond = FALSE;
    HKEY        hKey = NULL;
    LRESULT     lResult;
    GUID        guid;
    WCHAR       szKeyName[MAX_PATH], szGuid[64];

    do {

        if (lpszExecutable == NULL)
            break;

        if (CoCreateGuid(&guid) != S_OK)
            break;

        _strcpy_w(szKeyName, L"Software\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\");
        //the &guid returns an error, aswell.
        if (StringFromGUID2(&guid, szGuid, sizeof(szGuid) / sizeof(WCHAR))) {
            _strcat_w(szKeyName, szGuid);

            lResult = RegCreateKeyEx(HKEY_CURRENT_USER,
                szKeyName, 0, NULL, REG_OPTION_NON_VOLATILE, MAXIMUM_ALLOWED, NULL, &hKey, NULL);

            if (lResult != ERROR_SUCCESS)
                break;

            lResult = RegSetValueEx(hKey, L"UninstallString", 0, REG_SZ, (BYTE*)lpszExecutable,
                (DWORD)(_strlen_w(lpszExecutable) * sizeof(WCHAR)));

            if (lResult != ERROR_SUCCESS)
                break;

            bResult = ucmMasqueradedAPRLaunchFile(szGuid);
        }

    } while (bCond);

    if (hKey != NULL) {
        RegCloseKey(hKey);
        RegDeleteKey(HKEY_CURRENT_USER, szKeyName);
    }

    return bResult;
}
int main()
{
    bool h = ucmUninstallLauncherMethod(L"c:\\windows\\system32\\cmd.exe");
    if (h == TRUE)
        std::cout << "function returned true" << std::endl;
    else
        std::cout << "Function failed you imbicile" << std::endl;
    return 0;
}

Answer 1

原始源代码编写在C中，其中引用不存在，因此在CoCreateInstance中声明C接受指向CLSID的指针作为第一个参数。虽然在C++ CoCreateInstance中声明接受对CLSID的引用作为第一个参数，但您仍尝试传递指针。等等。因此，您会收到这些错误。将代码重新编译为C或删除不必要的地址。

解除引用传递给COM函数的变量的错误

代码：

1 个答案: