枚举句柄

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

static const int s_max = 1024;

BOOL CALLBACK EnumWindowsProc(HWND, LPARAM);
BOOL CALLBACK EnumChildWindowsProc(HWND, LPARAM);

int main()
{
	EnumWindows(EnumWindowsProc, NULL);

	system("pause");
	return 0;
}

BOOL CALLBACK EnumWindowsProc(HWND hwnd, LPARAM lparam)
{
	if (hwnd) {
		char text[s_max] = { 0 };
		GetWindowText(hwnd, text, s_max);
		if (strlen(text) > 0) {
			if (strcmp(text, "abc.txt - 记事本") == 0) {
				EnumChildWindows(hwnd, EnumChildWindowsProc, NULL);
			}
		}
		return TRUE;
	}
	return FALSE;
}

BOOL CALLBACK EnumChildWindowsProc(HWND hwnd, LPARAM)
{
	if (hwnd) {
		char text[s_max] = { 0 };
		GetWindowText(hwnd, text, s_max);
		std::cout << "child:" << text << std::endl;
		return TRUE;
	}
	return FALSE;
}