Add InternetError exception.

1 files changed, 22 insertions, 4 deletions

diff --git a/c/win.h b/c/win.h
index ab5cf05..f5bda59 100644
--- a/c/win.h
+++ b/c/win.h
@@ -16,14 +16,32 @@ int GetRelativeCursorPos(HWND hWnd, POINT* pt) noexcept;
 /* Cached values from GetSystemMetrics. */
 template <int I> auto Metric = GetSystemMetrics(I);
 
+struct WideException : public std::exception
+{
+	virtual const char* what() const noexcept = 0;
+	virtual const wchar_t* What() const noexcept = 0;
+};
+
 /* Exception for Windows API errors. */
-struct Win32Error : public std::exception
+struct Win32Error : public WideException
 {
-	Win32Error() noexcept;
-	Win32Error(DWORD code) noexcept;
+	Win32Error(DWORD code = GetLastError()) noexcept;
 	~Win32Error() noexcept;
 	const char* what() const noexcept override;
-	const wchar_t* What() const noexcept;
+	const wchar_t* What() const noexcept override;
+	DWORD code;
+private:
+	char* m_szMsg = nullptr;
+	wchar_t* m_wszMsg = nullptr;
+};
+
+/* Exception for extended Wininet errors. */
+struct InternetError : public WideException
+{
+	InternetError(DWORD codeSystem = GetLastError());
+	~InternetError() noexcept;
+	const char* what() const noexcept override;
+	const wchar_t* What() const noexcept override;
 	DWORD code;
 private:
 	char* m_szMsg = nullptr;