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    <pre><code>#include &lt;cstdio&gt; #include &lt;windows.h&gt; #include &lt;tlhelp32.h&gt; int main( int, char *[] ) { PROCESSENTRY32 entry; entry.dwSize = sizeof(PROCESSENTRY32); HANDLE snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, NULL); if (Process32First(snapshot, &amp;entry) == TRUE) { while (Process32Next(snapshot, &amp;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; } </code></pre> <p>Also, if you'd like to use PROCESS_ALL_ACCESS in OpenProcess, you could try this:</p> <pre><code>#include &lt;cstdio&gt; #include &lt;windows.h&gt; #include &lt;tlhelp32.h&gt; void EnableDebugPriv() { HANDLE hToken; LUID luid; TOKEN_PRIVILEGES tkp; OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &amp;hToken); LookupPrivilegeValue(NULL, SE_DEBUG_NAME, &amp;luid); tkp.PrivilegeCount = 1; tkp.Privileges[0].Luid = luid; tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED; AdjustTokenPrivileges(hToken, false, &amp;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, &amp;entry) == TRUE) { while (Process32Next(snapshot, &amp;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; } </code></pre>
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    1. POHow can I get a process handle by its name in C++?
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    1. COYou code will skip the first process in the system (however, first process is most likely "SYSTEM" so no user-visible bug.)
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    2. COThe first process is SYSTEM, so it's fine (I literally took that code straight from one of my projects) ;)
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    3. COWhen I attempt to act on the hProcess I get error code 6 which is ERROR_INVALID_HANDLE
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