参数类型“WCHAR *”与类型“const char *”的参数不兼容

Question

Found this useful code below, here in forum but it raised an error at this line

if (stricmp(entry.szExeFile, "target.exe") == 0)

says

Argument type "WCHAR *" is incompatible with parameter of type "const char *".

I'm using Visual Studio 2019.

#include <cstdio>
#include <windows.h>
#include <tlhelp32.h>

void EnableDebugPriv()
{
    HANDLE hToken;
    LUID luid;
    TOKEN_PRIVILEGES tkp;

    OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken);

    LookupPrivilegeValue(NULL, SE_DEBUG_NAME, &luid);

    tkp.PrivilegeCount = 1;
    tkp.Privileges[0].Luid = luid;
    tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;

    AdjustTokenPrivileges(hToken, false, &tkp, sizeof(tkp), NULL, NULL);

    CloseHandle(hToken);
}

int main(int, char* [])
{
    EnableDebugPriv();

    PROCESSENTRY32 entry;
    entry.dwSize = sizeof(PROCESSENTRY32);

    HANDLE snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, NULL);

    if (Process32First(snapshot, &entry) == TRUE)
    {
        while (Process32Next(snapshot, &entry) == TRUE)
        {
            if (stricmp(entry.szExeFile, "target.exe") == 0)
            {
                HANDLE hProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, entry.th32ProcessID);

                // Do stuff..

                CloseHandle(hProcess);
            }
        }
    }

    CloseHandle(snapshot);

    return 0;
}

Answer 1

You are compiling your project with its Character Set option set to Unicode, so Process32First() and Process32Next() map to their Unicode versions, thus entry.szExeFile is a WCHAR[] array.

But stricmp() takes char input instead, which is why the code fails to compile.

You need to use the Unicode version of stricmp instead, which is wcsicmp() or _wcsicmp() , eg:

if (wcsicmp(entry.szExeFile, L"target.exe") == 0)

Or better, use _tcsicmp() in <tchar.h> , since you are actually using the TCHAR version of the Process32... functions, eg:

if (_tcsicmp(entry.szExeFile, _T("target.exe")) == 0)