How to create check boxs dynamically, that will place in rows and columns?

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C++

MFC

Hello,

I'm trying to create checkboxs dynamically where that will places in rows & columns, i'm struggling with it for a couple of days and i completely run out of new ideas...
This part of program is working, but it's not exactly what i wanted to get:

Some thing like this alignment:



ch01 ch02 ch03 ch04
ch11 ch12 ch13 ch14
ch21 ch22 ch23 ch24

What I have tried:

const int tx =5;
		const int rx =8;
		int H1,L1;
		CRect rect;
		GetClientRect(&rect);
		H1 = rect.bottom/tx;
		L1 = rect.right/rx;

		for (int i=0;i<tx;i++)

		for (int j=0; j<rx; j++)
		{ 
		CPoint p;
		p.SetPoint(j*L1,i*H1);
		CButton* testbutton= new CButton();
		testbutton->Create(NULL, WS_VISIBLE | BS_AUTOCHECKBOX, CRect(10+p.x,10+p.y,H1+p.x,L1+p.y),this ,IDC_CHECK+(i+1)*(j+1)-1);
		
                q = IDC_CHECK+(i+1)*(j+1)-1;

		GetDlgItem(IDC_CHECK)->ShowWindow(SW_HIDE);
		testButton->GetCheck()==0;
		UpdateWindow();