How to Add Tooltips to Buttons and other UI Components (like - Checkbox, Radio button etc) in Win32 (C++) Desktop Application?

Hi there, I have a Win32 (C++) program on which I want to Add some Tooltips to some of it's UI components like - Button, Checkbox, Radio button. I tried a lot but nothing works.

Here is my Demo program :

#include <windows.h>
struct
{
	int iStyle;
	/*TCHAR* szText;*/
	TCHAR const* szText;
}
button[] =
{
BS_PUSHBUTTON, TEXT("PUSHBUTTON"),
BS_DEFPUSHBUTTON, TEXT("DEFPUSHBUTTON"),
BS_CHECKBOX, TEXT("CHECKBOX"),
BS_AUTOCHECKBOX, TEXT("AUTOCHECKBOX"),
BS_RADIOBUTTON, TEXT("RADIOBUTTON"),
BS_3STATE, TEXT("3STATE"),
BS_AUTO3STATE, TEXT("AUTO3STATE"),
BS_GROUPBOX, TEXT("GROUPBOX"),
BS_AUTORADIOBUTTON, TEXT("AUTORADIO"),
BS_OWNERDRAW, TEXT("OWNERDRAW")
};
#define NUM (sizeof button / sizeof button[0])
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
	PSTR szCmdLine, int iCmdShow)
{
	static TCHAR szAppName[] = TEXT("BtnLook");
	HWND hwnd;
	MSG msg;
	WNDCLASS wndclass;
	wndclass.style = CS_HREDRAW | CS_VREDRAW;
	wndclass.lpfnWndProc = WndProc;
	wndclass.cbClsExtra = 0;
	wndclass.cbWndExtra = 0;
	wndclass.hInstance = hInstance;
	wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
	wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
	wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
	wndclass.lpszMenuName = NULL;
	wndclass.lpszClassName = szAppName;
	if (!RegisterClass(&wndclass))
	{
		MessageBox(NULL, TEXT("This program requires Windows NT!"),
			szAppName, MB_ICONERROR);
		return 0;
	}
	hwnd = CreateWindow(szAppName, TEXT("Button Look"),
		WS_OVERLAPPEDWINDOW,
		400, 400,
		1297, 693,
		NULL, NULL, hInstance, NULL);
	ShowWindow(hwnd, iCmdShow);
	UpdateWindow(hwnd);
	while (GetMessage(&msg, NULL, 0, 0))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	static HWND hwndButton[NUM];
	static RECT rect;
	static TCHAR szTop[] = TEXT("message wParam lParam"),
		szUnd[] = TEXT("_______ ______ ______"),
		szFormat[] = TEXT("%-16s%04X-%04X %04X-%04X"),
		szBuffer[50];
	static int cxChar, cyChar;
	HDC hdc;
	PAINTSTRUCT ps;
	int i;
	switch (message)
	{
	case WM_CREATE:
		cxChar = LOWORD(GetDialogBaseUnits());
		cyChar = HIWORD(GetDialogBaseUnits());
		for (i = 0; i < NUM; i++)
			hwndButton[i] = CreateWindow(TEXT("button"),
				button[i].szText,
				WS_CHILD | WS_VISIBLE | button[i].iStyle,
				cxChar, cyChar * (1 + 2 * i),
				20 * cxChar, 7 * cyChar / 4,
				hwnd, (HMENU)i,
				((LPCREATESTRUCT)lParam)->hInstance, NULL);
		return 0;
	case WM_SIZE:
		rect.left = 24 * cxChar;
		rect.top = 2 * cyChar;
		rect.right = LOWORD(lParam);
		rect.bottom = HIWORD(lParam);
		return 0;
	case WM_PAINT:
		InvalidateRect(hwnd, &rect, TRUE);
		hdc = BeginPaint(hwnd, &ps);
		SelectObject(hdc, GetStockObject(SYSTEM_FIXED_FONT));
		SetBkMode(hdc, TRANSPARENT);
		TextOut(hdc, 24 * cxChar, cyChar, szTop, lstrlen(szTop));
		TextOut(hdc, 24 * cxChar, cyChar, szUnd, lstrlen(szUnd));
		EndPaint(hwnd, &ps);
		return 0;
	case WM_DRAWITEM:
	case WM_COMMAND:
		ScrollWindow(hwnd, 0, -cyChar, &rect, &rect);
		hdc = GetDC(hwnd);
		SelectObject(hdc, GetStockObject(SYSTEM_FIXED_FONT));
		TextOut(hdc, 24 * cxChar, cyChar * (rect.bottom / cyChar - 1),
			szBuffer,
			wsprintf(szBuffer, szFormat,
				message == WM_DRAWITEM ? TEXT("WM_DRAWITEM") :
				TEXT("WM_COMMAND"),
				HIWORD(wParam), LOWORD(wParam),
				HIWORD(lParam), LOWORD(lParam)));
		ReleaseDC(hwnd, hdc);
		ValidateRect(hwnd, &rect);
		break;
	case WM_DESTROY:
		PostQuitMessage(0);
		return 0;
	}
	return DefWindowProc(hwnd, message, wParam, lParam);
}

I hope you all know about Tooltips, sometimes it's very difficult to implement this in Win32 (C++). I hope any Windows Developer able to solve this problem.