From <Someone>

This was caused by  character set incompatibility between message and map
windows. Apparently, Nethack is using  IBM character set (CP 437) but fonts
were create for Windows ANSI codepage. I fixed most of it by changing
character set of the fonts except for the Rogue level. I had to make changes
to src/drawing.c for Rogue level since most of Windows fonts are not capable
of displaying control characters (char. code<0x20)
And of course, disabling IBMGraphics option fixes it all.

src/drawing.c

@@ -741,7 +741,7 @@ static const uchar r_oc_syms[MAXOCLASSES] = {
 static const uchar IBM_r_oc_syms[MAXOCLASSES] = {	/* a la EPYX Rogue */
 /* 0*/	'\0',
 	ILLOBJ_SYM,
-#  if defined(MSDOS) || defined(WIN32) || defined(OS2)
+#  if defined(MSDOS) || defined(OS2) || ( defined(WIN32) && !defined(MSWIN_GRAPHICS) )
 	0x18,			/* weapon: up arrow */
 /*	0x0a, */ ARMOR_SYM,	/* armor:  Vert rect with o */
 /*	0x09, */ RING_SYM,	/* ring:   circle with arrow */
@@ -798,6 +798,9 @@ boolean is_rlevel;
 	if (iflags.IBMgraphics
 #  if defined(USE_TILES) && defined(MSDOS)
 		&& !iflags.grmode
+#  endif
+#  if defined(MSWIN_GRAPHICS)
+		&& 0
 #  endif
 				)
 	    monsyms[S_HUMAN] = 0x01; /* smiley face */
@@ -842,6 +845,7 @@ boolean is_rlevel;
 	    showsyms[S_litcorr] = 0xb2;
 	    showsyms[S_upstair] = 0xf0; /* Greek Xi */
 	    showsyms[S_dnstair] = 0xf0;
+#ifndef MSWIN_GRAPHICS
 	    showsyms[S_arrow_trap] = 0x04; /* diamond (cards) */
 	    showsyms[S_dart_trap] = 0x04;
 	    showsyms[S_falling_rock_trap] = 0x04;
@@ -864,6 +868,7 @@ boolean is_rlevel;
 	    showsyms[S_magic_trap] = 0x04;
 	    showsyms[S_anti_magic_trap] = 0x04;
 	    showsyms[S_polymorph_trap] = 0x04;
+#endif
 	}
 #endif /* ASCIIGRAPH */
 

win/win32/mhfont.c

@@ -45,7 +45,7 @@ HGDIOBJ mswin_create_font(int win_type, int attr, HDC hdc)
 		lgfnt.lfItalic			=	FALSE;		         // italic attribute option
 		lgfnt.lfUnderline		=	FALSE;			     // underline attribute option
 		lgfnt.lfStrikeOut		=	FALSE;			     // strikeout attribute option
-		lgfnt.lfCharSet			=	DEFAULT_CHARSET;     // character set identifier
+		lgfnt.lfCharSet			=	OEM_CHARSET;     // character set identifier
 		lgfnt.lfOutPrecision	=	OUT_DEFAULT_PRECIS;  // output precision
 		lgfnt.lfClipPrecision	=	CLIP_DEFAULT_PRECIS; // clipping precision
 		lgfnt.lfQuality			=	DEFAULT_QUALITY;     // output quality
@@ -63,7 +63,7 @@ HGDIOBJ mswin_create_font(int win_type, int attr, HDC hdc)
 		lgfnt.lfItalic			=	(attr==ATR_BLINK)? TRUE: FALSE;		     // italic attribute option
 		lgfnt.lfUnderline		=	(attr==ATR_ULINE)? TRUE : FALSE;		 // underline attribute option
 		lgfnt.lfStrikeOut		=	FALSE;				// strikeout attribute option
-		lgfnt.lfCharSet			=	DEFAULT_CHARSET;     // character set identifier
+		lgfnt.lfCharSet			=	OEM_CHARSET;     // character set identifier
 		lgfnt.lfOutPrecision	=	OUT_DEFAULT_PRECIS;  // output precision
 		lgfnt.lfClipPrecision	=	CLIP_DEFAULT_PRECIS; // clipping precision
 		lgfnt.lfQuality			=	DEFAULT_QUALITY;     // output quality
@@ -81,7 +81,7 @@ HGDIOBJ mswin_create_font(int win_type, int attr, HDC hdc)
 		lgfnt.lfItalic			=	(attr==ATR_BLINK)? TRUE: FALSE;		     // italic attribute option
 		lgfnt.lfUnderline		=	(attr==ATR_ULINE)? TRUE : FALSE;		 // underline attribute option
 		lgfnt.lfStrikeOut		=	FALSE;			     // strikeout attribute option
-		lgfnt.lfCharSet			=	DEFAULT_CHARSET;     // character set identifier
+		lgfnt.lfCharSet			=	OEM_CHARSET;     // character set identifier
 		lgfnt.lfOutPrecision	=	OUT_DEFAULT_PRECIS;  // output precision
 		lgfnt.lfClipPrecision	=	CLIP_DEFAULT_PRECIS; // clipping precision
 		lgfnt.lfQuality			=	DEFAULT_QUALITY;     // output quality
@@ -98,31 +98,13 @@ HGDIOBJ mswin_create_font(int win_type, int attr, HDC hdc)
 		lgfnt.lfItalic			=	(attr==ATR_BLINK)? TRUE: FALSE;		     // italic attribute option
 		lgfnt.lfUnderline		=	(attr==ATR_ULINE)? TRUE : FALSE;		 // underline attribute option
 		lgfnt.lfStrikeOut		=	FALSE;			     // strikeout attribute option
-		lgfnt.lfCharSet			=	DEFAULT_CHARSET;     // character set identifier
+		lgfnt.lfCharSet			=	OEM_CHARSET;     // character set identifier
 		lgfnt.lfOutPrecision	=	OUT_DEFAULT_PRECIS;  // output precision
 		lgfnt.lfClipPrecision	=	CLIP_DEFAULT_PRECIS; // clipping precision
 		lgfnt.lfQuality			=	DEFAULT_QUALITY;     // output quality
 		lgfnt.lfPitchAndFamily	=	FIXED_PITCH;		 // pitch and family
 		/* lgfnt.lfFaceName */
 		break;
-
-	case NHW_MAP:
-		lgfnt.lfHeight			=	-TILE_Y;			 // height of font
-		lgfnt.lfWidth			=	-TILE_X;		     // average character width
-		lgfnt.lfEscapement		=	0;					 // angle of escapement
-		lgfnt.lfOrientation		=	0;					 // base-line orientation angle
-		lgfnt.lfWeight			=	FW_NORMAL;			 // font weight
-		lgfnt.lfItalic			=	FALSE;			     // italic attribute option
-		lgfnt.lfUnderline		=	FALSE;				 // underline attribute option
-		lgfnt.lfStrikeOut		=	FALSE;			     // strikeout attribute option
-		lgfnt.lfCharSet			=	DEFAULT_CHARSET;	     // character set identifier
-														// we need OEM charset for Rogue level
-		lgfnt.lfOutPrecision	=	OUT_DEFAULT_PRECIS;  // output precision
-		lgfnt.lfClipPrecision	=	CLIP_DEFAULT_PRECIS; // clipping precision
-		lgfnt.lfQuality			=	DEFAULT_QUALITY;     // output quality
-		lgfnt.lfPitchAndFamily	=	FIXED_PITCH;		 // pitch and family
-		_tcscpy( lgfnt.lfFaceName, TEXT("Terminal"));
-		break;
 	}
 
 	fnt = CreateFontIndirect(&lgfnt);

win/win32/mhmap.c

@@ -6,8 +6,8 @@
 #include "mhmap.h"
 #include "mhmsg.h"
 #include "mhinput.h"
-#include "mhfont.h"
 
+#define NHMAP_FONT_NAME TEXT("Terminal")
 #define MAXWINDOWTEXT 255
 
 extern short glyph2tile[];
@@ -156,7 +156,7 @@ void mswin_map_stretch(HWND hWnd, LPSIZE lpsz, BOOL redraw)
 	lgfnt.lfClipPrecision	=	CLIP_DEFAULT_PRECIS; // clipping precision
 	lgfnt.lfQuality			=	DEFAULT_QUALITY;     // output quality
 	lgfnt.lfPitchAndFamily	=	FIXED_PITCH;		 // pitch and family
-	_tcscpy(lgfnt.lfFaceName, TEXT("Terminal"));
+	_tcscpy(lgfnt.lfFaceName, NHMAP_FONT_NAME);
 	data->hMapFont = CreateFontIndirect(&lgfnt);
 
 	mswin_cliparound(data->xCur, data->yCur);