diff --git a/news.h b/news.h
--- a/news.h
+++ b/news.h
@@ -30,7 +30,7 @@ void InitNewsItemStructs(void);
 
 VARDEF NewsItem _statusbar_news_item;
 
-enum {
+enum NewsType {
 	NT_ARRIVAL_PLAYER = 0,
 	NT_ARRIVAL_OTHER  = 1,
 	NT_ACCIDENT       = 2,
@@ -44,27 +44,34 @@ enum {
 };
 
 enum NewsMode {
-	NM_SMALL    = 0,
-	NM_NORMAL   = 1,
-	NM_THIN     = 2,
-	NM_CALLBACK = 3,
+	NM_SMALL    = 0, ///< Show only a small popup informing us about vehicle age for example
+	NM_NORMAL   = 1, ///< Show a simple news message (height 170 pixels)
+	NM_THIN     = 2, ///< Show a simple news message (height 130 pixels)
+	NM_CALLBACK = 3, ///< Do some special processing before displaying news message. Which callback to call is in NewsCallback
 };
 
 enum NewsFlags {
-	NF_VIEWPORT  = 0x01,
-	NF_TILE      = 0x04,
-	NF_VEHICLE   = 0x08,
-	NF_FORCE_BIG = 0x10,
-	NF_NOEXPIRE  = 0x20,
-	NF_INCOLOR   = 0x40,
+	NF_VIEWPORT  = (1 << 1), ///< Does the news message have a viewport? (ingame picture of happening)
+	NF_TILE      = (1 << 2), ///< When clicked on the news message scroll to a given tile? Tile is in data_a/data_b
+	NF_VEHICLE   = (1 << 3), ///< When clicked on the message scroll to the vehicle? VehicleID is in data_a
+	NF_FORCE_BIG = (1 << 4), ///< Force the appearance of a news message if it has already been shown (internal)
+	NF_NOEXPIRE  = (1 << 5), ///< Some flag that I think is already deprecated
+	NF_INCOLOR   = (1 << 6), ///< Show the newsmessage in colour, otherwise it defaults to black & white
 };
 
-enum {
-	DNC_TRAINAVAIL    = 0,
-	DNC_ROADAVAIL     = 1,
-	DNC_SHIPAVAIL     = 2,
-	DNC_AIRCRAFTAVAIL = 3,
-	DNC_BANKRUPCY     = 4,
+enum NewsCallback {
+	DNC_TRAINAVAIL    = 0, ///< Show new train available message. StringID is EngineID
+	DNC_ROADAVAIL     = 1, ///< Show new road vehicle available message. StringID is EngineID
+	DNC_SHIPAVAIL     = 2, ///< Show new ship available message. StringID is EngineID
+	DNC_AIRCRAFTAVAIL = 3, ///< Show new aircraft available message. StringID is EngineID
+	DNC_BANKRUPCY     = 4, ///< Show bankrupcy message. StringID is PlayerID (0-3) and NewsBankrupcy (4-7)
+};
+
+enum NewsBankrupcy {
+	NB_BTROUBLE    = (1 << 4), ///< Company is in trouble (warning)
+	NB_BMERGER     = (2 << 4), ///< Company has been bought by another company
+	NB_BBANKRUPT   = (3 << 4), ///< Company has gone bankrupt
+	NB_BNEWCOMPANY = (4 << 4), ///< A new company has been started
 };
 
 /**