// Create process
string processArgs[] = { programPath, "argA", "argB", "argC" };
int processID = newProcess(processArgs);

// Set I/O encoding
setProcessInputEncoding(processID, "CP932");
setProcessOutputEncoding(processID, "CP932");
setProcessErrorEncoding(processID, "CP932");

// Start execution
startProcess(processID);
...