--- a/WindowsIconReader.st	Mon Mar 07 10:31:02 2016 +0100
+++ b/WindowsIconReader.st	Mon Mar 07 11:12:02 2016 +0100
@@ -71,7 +71,15 @@
           DataOffset     4 bytes     10      File offset to Raster Data
 
       InfoHeader        40 bytes            Windows Structure: BITMAPINFOHEADER
-
+        different sizes, depending on Windows-version:
+                        12 - Win2.x or OS/2 1.x
+                        40 - WinNT, Win3.x or later
+                        52 - adds undocumented; adds r/g/b masks
+                        56 - adds undocumented; adds r/g/b/a masks
+                        64 - OS/2 2.x
+                        108 - WinNT4.0, 95 or later
+                        124 - WinNT5.0, 98 or later
+      
           Size           4 bytes     14      Size of InfoHeader =40
           Width          4 bytes     18      Bitmap Width
           Height         4 bytes     22      Bitmap Height
@@ -89,6 +97,7 @@
                                              3 = BITFIELDS      Windows V3+ only
                                              4 = JPEG           Windows V3+ only
                                              5 = PNG            Windows V3+ only
+                                             6 = ALPHA_BITFIELDS Windows CE only
         
                                              3 = HUFFMAN1D      OS/2 2.x-only
                                              4 = RLE24          OS/2 2.x-only
@@ -102,7 +111,8 @@
           ColorsImportant
                          4 bytes     50      Number of important colors
                                              0 = all
-       ColorTable        4 * NumColors bytes
+
+       ColorTable        4 * NumColors bytes (3 on Win2)
                                              present only if Info.BitsPerPixel <= 8
                                              colors should be ordered by importance
 
@@ -1297,7 +1307,7 @@
 
             numBytesPerColorInColormap := 3.
 
-            iSize >= 64 ifTrue:[
+            iSize == 64 ifTrue:[
                 "/
                 "/ its an OS/2 (vsn2) BMP file
                 "/
@@ -1309,6 +1319,7 @@
                 numColor := bitmapHeader doubleWordAt:(32 + 1) MSB:false.
                 numImportantColor := bitmapHeader doubleWordAt:(36 + 1) MSB:false.
                 (compression > 2) ifTrue:[
+                    "/ 3 = HUFFMAN; 4 = RLE24
                     ^ self fileFormatError:'unhandled OS2 compression'.
                 ].
                 numColor == 0 ifTrue:[