The process accepts the return code passed by the process end and the return code sent by the process.

The process accepts the return code passed by the process end and the return code sent by the process.

In the project, I want to implement the following function: process A creates process B to run, and uses the error code returned when process B ends.

According to some online code, such an absolutely feasible solution was finally formed. Process:

If (CreateProcess (NULL, m_file, NULL, NULL, TRUE, CREATE_NEW_PROCESS_GROUP | CREATE_DEFAULT_ERROR_MODE, NULL, NULL, & SI, & PI) {// Wait until child process exits. waitForSingleObject (PI. hProcess, INFINITE); GetExitCodeProcess (PI. hProcess, & exitCode); // Close process and thread handles. closeHandle (PI. hProcess); CloseHandle (PI. hThread); if (ID_CANCEL = exitCode) break ;}

In process B, send the WM_QUIT message through PostQuitMessage (exit), and then get the error code through wparam.

While (msg. message! = WM_QUIT) {if (PeekMessage (& msg, NULL, 0U, 0U, PM_REMOVE) {// process external message TranslateMessage (& msg); DispatchMessage (& msg );} else {}} return msg. wParam;