Microsoft KB Archive/42587

Knowledge Base

VB for MS-DOS Program to Change Mouse Shape in Grahpics Mode

Article ID: 42587

Article Last Modified on 8/16/2005

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APPLIES TO

• Microsoft Visual Basic for MS-DOS
• Microsoft QuickBasic 4.0
• Microsoft QuickBASIC 4.0b
• Microsoft QuickBasic 4.5 for MS-DOS
• Microsoft BASIC Compiler 6.0
• Microsoft BASIC Compiler 6.0b
• Microsoft BASIC Professional Development System 7.0
• Microsoft BASIC Professional Development System 7.1

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This article was previously published under Q42587

SUMMARY

The code listed below demonstrates a method of creating a mouse cursor of a different shape when in a graphics mode. This example shape is taken from Page 7-31 of the "Microsoft Mouse Programmer's Reference Guide" and requires an IBM EGA or IBM VGA or compatible graphics adapter.

The sample Basic code on Page 6-15 of the same manual is not appropriate for Visual Basic for MS-DOS. The following changes must be made:

1. The array "CURSOR" must be dimensioned.
2. The array "CURSOR" must be in a COMMON block.
3. The fourth parameter passed to MOUSE on line 4500 must be VARPTR(CURSOR(0,0))

The information in this article is also included in the Help file that is provided with Microsoft Visual Basic programming system for MS-DOS, version 1.0.

When using Basic PDS for MS-DOS, version 7.0 or 7.1 it is also possible to use the MOUSEDRIVER SUBprogram in the MOUSE.BAS portion of the User Interface Toolbox (rather then the CALL INTERRUPT method shown below) to change the mouse pointer shape.

MORE INFORMATION

Code Example

' To try this example in VBDOS.EXE:
' 1. From the File menu, choose New Project.
' 2. Copy the code example to the Code window.
' 3. Press F5 to run the program.

DECLARE SUB mouse (m1%, m2%, m3%, m4%)
DECLARE FUNCTION MouseInit% ()
DECLARE SUB MouseShow ()
DECLARE SUB MouseButPos (ButStat%, CurHor%, CurVert%)

' To run this program in the environment, you must invoke the
' environment with the /L switch to load the default Quick library:
'    VBDOS.EXE /L          for Visual Basic 1.0 for MS-DOS

' Use the following include file for Visual Basic 1.0 for MS-DOS:
REM $INCLUDE: 'VBDOS.BI'
' Use the following include file for QuickBasic for MS-DOS:
REM $INCLUDE: 'QB.BI'
' Use the following include file for Basic PDS for MS-DOS:
REM $INCLUDE: 'QBX.BI'

DEFINT A-Z
DIM cursor(16, 2)
COMMON cursor()

' Data for an HOUR Glass shape.
'Array Screen Mask             binary
Cursor(0, 0) = &H07E0         '0000011111100000
Cursor(1, 0) = &H0180         '0000000110000000
Cursor(2, 0) = &H0000         '0000000000000000
Cursor(3, 0) = &HC003         '1100000000000011
Cursor(4, 0) = &HF00F         '1111000000001111
Cursor(5, 0) = &HC003         '1100000000000011
Cursor(6, 0) = &H0000         '0000000000000000
Cursor(7, 0) = &H0180         '0000000110000000
Cursor(8, 0) = &H07E0         '0000011111100000
Cursor(9, 0) = &HFFFF         '1111111111111111
Cursor(10, 0) = &HFFFF         '1111111111111111
Cursor(11, 0) = &HFFFF        '1111111111111111
Cursor(12, 0) = &HFFFF        '1111111111111111
Cursor(13, 0) = &HFFFF        '1111111111111111
Cursor(14, 0) = &HFFFF        '1111111111111111
Cursor(15, 0) = &HFFFF        '1111111111111111

' Cursor mask                 binary
Cursor(0, 1) = &H0000         '0000000000000000
Cursor(1, 1) = &H700E         '0111000000001110
Cursor(2, 1) = &H1C38         '0001110000111000
Cursor(3, 1) = &H0660         '0000011001100000
Cursor(4, 1) = &H03C0         '0000001111000000
Cursor(5, 1) = &H0660         '0000011001100000
Cursor(6, 1) = &H1C38         '0001110000111000
Cursor(7, 1) = &H700E         '0111000000001110
Cursor(8, 1) = &H0000         '0000000000000000
Cursor(9, 1) = &H0000         '0000000000000000
Cursor(10, 1) = &H0000        '0000000000000000
Cursor(11, 1) = &H0000        '0000000000000000
Cursor(12, 1) = &H0000        '0000000000000000
Cursor(13, 1) = &H0000        '0000000000000000
Cursor(14, 1) = &H0000        '0000000000000000
Cursor(15, 1) = &H0000        '0000000000000000


Button$(0) = "Left Up   / Right Up  "
Button$(1) = "Left Down / Right Up  "
Button$(2) = "Left Up   / Right Down"
Button$(3) = "Left Down / Right Down"

SCREEN 9
' This part initializes the mouse.
IF MouseInit = 0 THEN
  PRINT "can not initialize mouse"
  END
END IF

' This is the part that makes the shape.
m1 = 9
m2 = 7
m3 = 7
m4 = VARPTR(cursor(0, 0))
CALL mouse(m1, m2, m3, m4)

' This call turns the mouse cursor on.
MouseShow

LOCATE 10, 10: PRINT "Button Status :";
LOCATE 11, 10: PRINT "Horizontal pos :";
LOCATE 12, 10: PRINT "Vertical pos  :";

WHILE INKEY$ = ""
CALL MouseButPos(ButStat, CurHor, CurVert)

LOCATE 10, 25: PRINT Button$(ButStat)
LOCATE 11, 25: PRINT CurHor
LOCATE 12, 25: PRINT CurVert
WEND

SUB mouse (m1, m2, m3, m4)
  DIM InRegs AS RegType
  InRegs.ax = m1
  InRegs.bx = m2
  InRegs.cx = m3
  InRegs.dx = m4
  CALL INTERRUPT(51, InRegs, InRegs)
  m1 = InRegs.ax
  m2 = InRegs.bx
  m3 = InRegs.cx
  m4 = InRegs.dx

END SUB

SUB MouseButPos (ButStat, CurHor, CurVert)
  m1 = 3
  CALL mouse(m1, m2, m3, m4)
  ButStat = m2
  CurHor = m3
  CurVert = m4
END SUB

FUNCTION MouseInit
   m1 = 0
   CALL mouse(m1, m2, m3, m4)
   MouseInit = m1

END FUNCTION

SUB MouseShow
  m1 = 1
  CALL mouse(m1, m2, m3, m4)

END SUB
                

Additional query words: VBmsdos QuickBas BasicCom 1.00 4.00 4.00b 4.50 6.00 6.00b 7.00 7.10

Keywords: KB42587

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