How to Launch a Windows Executable Using ::CreateProcess in C ?

Launching a Windows Executable Using ::CreateProcess in C

One of the key aspects of programming in Windows environments is the ability to launch executable files and manage their execution. This article provides a comprehensive guide on utilizing the ::CreateProcess function in C to accomplish this task.

To effectively launch an EXE, wait for its completion, and handle resource cleanup, consider the following steps:

1. Declaring Necessary Structures: Begin by declaring STARTUPINFO and PROCESS_INFORMATION structures to capture process information, handles, and other runtime attributes.
2. Setting Startup Parameters: Configure the STARTUPINFO structure to specify the path to the executable, command-line arguments, and any desired process creation flags.
3. Creating the Process: Utilize the ::CreateProcess function to generate the new process, passing in the STARTUPINFO structure and capturing the PROCESS_INFORMATION structure.
4. Waiting for Process Completion: To ensure the calling thread does not proceed until the launched EXE finishes, employ the WaitForSingleObject function with the hProcess handle obtained from the PROCESS_INFORMATION structure.
5. Closing Process Handles: After the EXE finishes, properly close all relevant handles. This involves closing both the hProcess and hThread handles from the PROCESS_INFORMATION structure.

To illustrate these steps, refer to the following code snippet:

<code class="c++">STARTUPINFO info={sizeof(info)};
PROCESS_INFORMATION processInfo;
if (CreateProcess(path, cmd, NULL, NULL, TRUE, 0, NULL, NULL, &amp;info, &amp;processInfo))
{
    WaitForSingleObject(processInfo.hProcess, INFINITE);
    CloseHandle(processInfo.hProcess);
    CloseHandle(processInfo.hThread);
}</code>

By following these steps, you can effectively launch Windows executables using ::CreateProcess in C , ensuring proper execution and resource cleanup.

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