SysLink control demo

For Visual C++ 6.0 compatibility, the control requires the common controls library and the ICC_LINK_CLASS initialization flag.

#include <windows.h>
#include <commctrl.h>
#include <shellapi.h>
#ifndef UNICODE
#define UNICODE
#endif

// Force the compiler/linker to use Common Controls Version 6 for Visual Styles & SysLink support
#pragma comment(linker,"\"/manifestdependency:type='win32' \
name='Microsoft.Windows.Common-Controls' version='6.0.0.0' \
processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'\"")

// Link against the common controls library
#pragma comment(lib, "comctl32.lib")

const wchar_t CLASS_NAME[] = L"SysLinkWindowClassName";
HWND hwndLink = NULL;

LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
	switch (uMsg)
	{
	case WM_CREATE:
	{
					  // Initialize common controls specifically for SysLink
					  INITCOMMONCONTROLSEX iccex;
					  iccex.dwSize = sizeof(INITCOMMONCONTROLSEX);
					  iccex.dwICC = ICC_LINK_CLASS;
					  InitCommonControlsEx(&iccex);

					  // Explicitly using the Unicode creation variant
					  hwndLink = CreateWindowExW(
						  0, WC_LINK,
						  L"Click here to visit <A HREF=\"https://www.google.com\">Google</A>.",
						  WS_VISIBLE | WS_CHILD | WS_TABSTOP,
						  20, 30, 250, 30,
						  hwnd, NULL, ((LPCREATESTRUCT)lParam)->hInstance, NULL
						  );
					  return 0;
	}

	case WM_NOTIFY:
	{
					  LPNMHDR pnmh = (LPNMHDR)lParam;

					  if (pnmh->hwndFrom == hwndLink && pnmh->code == NM_CLICK)
					  {
						  PNMLINK pNMLink = (PNMLINK)lParam;
						  ShellExecuteW(NULL, L"open", pNMLink->item.szUrl, NULL, NULL, SW_SHOWNORMAL);
						  return TRUE;
					  }
					  break;
	}

	case WM_DESTROY:
		PostQuitMessage(0);
		return 0;
	}

	return DefWindowProc(hwnd, uMsg, wParam, lParam);
}

int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PWSTR pCmdLine, int nCmdShow)
{
	WNDCLASS wc = {};
	wc.lpfnWndProc = WindowProc;
	wc.hInstance = hInstance;
	wc.lpszClassName = CLASS_NAME;
	wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);

	RegisterClass(&wc);

	HWND hwnd = CreateWindowExW(
		0, CLASS_NAME, L"Win32 SysLink Example",
		WS_OVERLAPPEDWINDOW,
		CW_USEDEFAULT, CW_USEDEFAULT, 400, 150,
		NULL, NULL, hInstance, NULL
		);

	if (hwnd == NULL) return 0;

	ShowWindow(hwnd, nCmdShow);

	MSG msg = {};
	while (GetMessage(&msg, NULL, 0, 0) > 0)
	{
		if (!IsDialogMessage(hwnd, &msg))
		{
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
	}

	return 0;
}