Add comments.

1 files changed, 16 insertions, 11 deletions

diff --git a/c/common.cpp b/c/common.cpp
index 494c382..a91836d 100644
--- a/c/common.cpp
+++ b/c/common.cpp
@@ -2,6 +2,8 @@
 
 #include "common.h"
 
+/* Win32Error: Exception for Windows API errors. */
+
 Win32Error::Win32Error(const DWORD dwErr) : m_dwErr(dwErr) {}
 
 Win32Error::~Win32Error()
@@ -46,6 +48,8 @@ const TCHAR* Win32Error::twhat() const noexcept
 #undef M
 }
 
+/* Library: Wrapper for loading and freeing dynamically linked libraries. */
+
 Library::Library(const TCHAR* const tszLibrary)
 {
 	m_hModule = LoadLibrary(tszLibrary);
@@ -66,21 +70,22 @@ static LRESULT CALLBACK CBTProc(const int nCode, const WPARAM wParam, const LPAR
 		return CallNextHookEx(0, nCode, wParam, lParam);
 
 	HWND hWnd = (HWND)wParam;
-	if (long lStyle = GetWindowLong(hWnd, GWL_STYLE))
-		if (lStyle & WS_POPUP) {
-			RECT rcMain, rcMsg;
-			GetWindowRect(g_hWnd, &rcMain);
-			GetWindowRect(hWnd, &rcMsg);
-			SetWindowPos(hWnd, NULL,
-			    rcMain.left+(rcMain.right-rcMain.left)/2-(rcMsg.right-rcMsg.left)/2,
-			    rcMain.top+(rcMain.bottom-rcMain.top)/2-(rcMsg.bottom-rcMsg.top)/2,
-			    -1, -1,
-			    SWP_NOZORDER|SWP_NOSIZE|SWP_NOACTIVATE);
-		}
+	long lStyle = GetWindowLong(hWnd, GWL_STYLE);
+	if (!(lStyle & WS_POPUP)) return 0;
+
+	RECT rcMain, rcMsg;
+	GetWindowRect(g_hWnd, &rcMain);
+	GetWindowRect(hWnd, &rcMsg);
+	SetWindowPos(hWnd, NULL,
+	    rcMain.left+(rcMain.right-rcMain.left)/2-(rcMsg.right-rcMsg.left)/2,
+	    rcMain.top+(rcMain.bottom-rcMain.top)/2-(rcMsg.bottom-rcMsg.top)/2,
+	    -1, -1,
+	    SWP_NOZORDER|SWP_NOSIZE|SWP_NOACTIVATE);
 
 	return 0;
 }
 
+/* Show message box owned by and centered in the main window. */
 int EBMessageBox(const TCHAR* const tszText, const TCHAR* const tszCaption, const unsigned uType)
 {
 	extern HWND g_hWnd;