Question

尝试使用CreateProcess：

运行记事本

void _tmain( int argc, TCHAR *argv[] )
{
    STARTUPINFO si;
    PROCESS_INFORMATION pi;

    ZeroMemory( &si, sizeof(si) );
    si.cb = sizeof(si);
    ZeroMemory( &pi, sizeof(pi) );



    // Start the child process. 
    if( !CreateProcess( "notepad.exe",   // No module name (use command line)
        NULL,        // Command line
        NULL,           // Process handle not inheritable
        NULL,           // Thread handle not inheritable
        FALSE,          // Set handle inheritance to FALSE
        0,              // No creation flags
        NULL,           // Use parent's environment block
        NULL,           // Use parent's starting directory 
        &si,            // Pointer to STARTUPINFO structure
        &pi )           // Pointer to PROCESS_INFORMATION structure
        ) 
    {
        printf( "CreateProcess failed (%d).\n", GetLastError() );
        return;
    }

    // Wait until child process exits.
    WaitForSingleObject( pi.hProcess, INFINITE );

    // Close process and thread handles. 
    CloseHandle( pi.hProcess );
    CloseHandle( pi.hThread );
}

输出2出错。这意味着ERROR_FILE_NOT_FOUND。我应该从哪里开始寻找问题？这是否意味着找不到notepad.exe？

Answer 1

lpApplicationName参数必须提供应用程序的完整路径，而不仅仅是其名称。

更确切地说：

该字符串可以指定模块的完整路径和文件名执行或它可以指定部分名称。在部分的情况下 name，该函数使用当前驱动器和当前目录完成规范。功能不会使用搜索路径。此参数必须包含文件扩展名;没有默认值假定延期。

但是你应该不在notepad.exe的当前文件夹中。因此，如果您只想使用名称，请在第二个参数lpCommandLine中设置它。请注意，此字符串不是常量，因为它以这种方式定义为LPTSTR参数：

BOOL WINAPI CreateProcess（
    _In_opt_ LPCTSTR lpApplicationName，
    _Inout_opt_ LPTSTR lpCommandLine，[...]

所以你有两个变种：

STARTUPINFO si = { sizeof(si) };
PROCESS_INFORMATION pi;

WCHAR CommandLine[] = L"notepad.exe";
if( CreateProcess( 0,   // No module name (use command line)
    CommandLine,        // Command line
    NULL,           // Process handle not inheritable
    NULL,           // Thread handle not inheritable
    FALSE,          // Set handle inheritance to FALSE
    0,              // No creation flags
    NULL,           // Use parent's environment block
    NULL,           // Use parent's starting directory 
    &si,            // Pointer to STARTUPINFO structure
    &pi )           // Pointer to PROCESS_INFORMATION structure
    ) 
{
    CloseHandle(pi.hThread);
    CloseHandle(pi.hProcess);
}

或

STARTUPINFO si = { sizeof(si) };
PROCESS_INFORMATION pi;

if( CreateProcess( L"c:\\windows\\notepad.exe",  
    0,        // Command line
    NULL,           // Process handle not inheritable
    NULL,           // Thread handle not inheritable
    FALSE,          // Set handle inheritance to FALSE
    0,              // No creation flags
    NULL,           // Use parent's environment block
    NULL,           // Use parent's starting directory 
    &si,            // Pointer to STARTUPINFO structure
    &pi )           // Pointer to PROCESS_INFORMATION structure
    ) 
{
    CloseHandle(pi.hThread);
    CloseHandle(pi.hProcess);
}

CreateProcess时ERROR_FILE_NOT_FOUND

1 个答案: