'const char*' 和 'WCHAR*'

Question

It's my first time making an external gamehacking application, and I'm having tourble with something.

My issue: Cannot convert 'const char*' to 'WCHAR*' in argument passing.

I already tried to change the character set to multibyte, but its still showning an error.

#include <iostream>
#include <Windows.h>
#include <TlHelp32.h>

HANDLE hProc = NULL;
DWORD pID;

bool attachProc(char* procName)
{
    PROCESSENTRY32 procEntry32;
    procEntry32.dwSize = sizeof(PROCESSENTRY32);
    
    auto hProcSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
    if (hProcSnap == INVALID_HANDLE_VALUE) 
    {
        std::cout << "Snapshot failed :((" << std::endl;
        return false;
    }

    while (Process32Next(hProcSnap, &procEntry32))
    {
        std::cout << procEntry32.szExeFile << std::endl;

        if (!strcmp(procName, procEntry32.szExeFile)) //ERROR RIGHT THERE
        {
            std::cout << "Process found: " << procEntry32.szExeFile << " Process id: " << procEntry32.th32ProcessID << std::endl;
            hProc = OpenProcess(PROCESS_ALL_ACCESS, FALSE, procEntry32.th32ProcessID);
            pID = procEntry32.th32ProcessID;

            if (hProc == NULL)
            {
                std::cout << "Process handling failed." << std::endl;
            }

            CloseHandle(hProcSnap);
            return true;
        }
    }
    std::cout << "Couldn't find " << procName << " in the process snapshot." << std::endl;
    CloseHandle(hProcSnap);
    return false;
}

template <class dataType>
void wpm(dataType valToWrite, DWORD addressToWrite) {
    WriteProcessMemory(hProc, (PVOID)addressToWrite, &valToWrite, sizeof(dataType), 0);
}

template <class dataType>
void rpm(DWORD addressToRead)
{
    dataType rpmBuffer;

    ReadProcessMemory(hProc, (PVOID)addressToRead, rpmBuffer, sizeof(dataType), 0);

    return rpmBuffer;
}

int main()
{

    DWORD memoryAddress;
    attachProc((char*)"hl2.exe");
}

Tysm, i hope u guys can help me out with this.

Answer 1

You should be getting an error. First, const char* could be compatible with const WCHAR* and not WCHAR* .

Another thing, usually, in Windows, WCHAR characters stand for utf-16 characters, and ascii characters are not the same as utf-16 . Windows has a built-in function converting from utf-8 or ascii to utf-16 , as follows:

    const auto result = MultiByteToWideChar(
        CP_ACP,
        MB_ERR_INVALID_CHARS,
        yourStringHere,
        yourStringSizeHere
        yourTargetStringHere,
        yourTargetStringSizeHere
    );

And, the C-standard library has an equivalent implementation -

std::mbstowcs(wchar_t* dst, const char* src, std::size_t len);