枚举桌面窗口并获取进程信息

#include <Windows.h>
#include <Psapi.h>
#include <iostream>

#pragma comment(lib, "psapi.lib")
using namespace std;

BOOL CALLBACK EnumWindowsProc(HWND hwnd, LPARAM lParam)
{
	if (GetParent(hwnd) == NULL && IsWindowVisible(hwnd))
	{
		char WindowText[100] = {0};
		::GetWindowTextA(hwnd, WindowText, 100);
		if (strlen(WindowText) != 0)
		{
			std::cout << WindowText <<std::endl;
			char szClassName[100] = {0};
			::GetClassNameA(hwnd, szClassName, 100);
			cout<< szClassName <<endl;
			DWORD dwPID = 0;
			GetWindowThreadProcessId(hwnd, &dwPID);
			cout<< "PID: "<<dwPID <<endl;
			HANDLE hProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, dwPID);
			cout<< "PHandle: "<<hProcess<< endl;

			HMODULE hMod = NULL;
			DWORD dwcbNeeded = 0;
			if (EnumProcessModules(hProcess, &hMod, sizeof(hMod), &dwcbNeeded))
			{
				char szPath[MAX_PATH] = {0};
				GetModuleFileNameA(hMod, szPath, MAX_PATH);
				cout<< szPath << endl;
				GetModuleFileNameExA(hProcess, hMod, szPath, MAX_PATH);
				cout<< szPath<<std::endl <<endl;;
			}
			CloseHandle(hProcess);
		}
	}
	return TRUE;
}
int _tmain(int argc, _TCHAR* argv[])
{
	EnumWindows(EnumWindowsProc, 0);

	system("pause");
	return 0;
}

另外上面的代码中在获取进程模块路径时用到的GetModuleFileNameA和GetModuleFileNameExA两个API获取路径不同, 第一个只能获取本进程的模块路径,包括主路径和dll路径(比如 kernel32.dll)。 

第二个可以获取用OpenProcess打开的进程句柄的路径。