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-
- Vertical Spin Control for Windows NT by Mark Gamber 8/16/92
- Version 0.2
-
- This DLL provides a vertical spin control for use with the Windows NT Dialog
- Editor. TO use the control, select "Open Custom" from the "File" menu and
- select "VSPIN.DLL" from the listbox displayed. Selecting the custom control
- item from the toolbox will allow you to select and place the control.
-
- A spin control is most commonly used to alter a number in an edit box,
- staying within the minimum and maximum allowable values. VSPIN allows you to
- attach an edit box window handle to the spin control. In doing so, you let the
- spin button control the contents of the edit box, incrementing and decrementing
- the value automatically. The minimum and maximum values may be set by the user.
- In addition, the spin control may cause to value to "wrap" if a range value is
- crossed. By selecting the "wrap" feature, a value in the edit box will change
- to the lowest or highest allowed value should the highest or lowest value be
- reached, respectively. The spin control also tells it's parent window when it's
- been clicked upon by posting a WM_COMMAND message to the parent.
- The lowest allowable value is zero and the highest is 65533. To set the low
- value to zero, you would need to pass -1 (0xFFFF) and for 65533, you would pass
- 65534. You may not set 65535 as the highest value unless you want to lose
- complete control of your life.
-
-
- Messages to Parent:
- Message wParam HI-lParam LO-lParam
- ------------ ------------- ------------ -------------
- WM_COMMAND ID Number BN_CLICKED 0=lower half clicked
- 1=upper half clicked
-
- Messages to Control:
- Message wParam HI-lParam LO-lParam
- ------------ ------------- ------------ -------------
- BM_SETSTATE Edit box handle Highest Value + 1 Lowest Value - 1
- BM_SETSTYLE Wrap On = 1 Unused Unused
-
-
-
- Example code:
-
- switch( msg )
- {
- case WM_INITDIALOG: // First, attach edit box to spin button
- { // and set low-high to 0 and 10
- SendMessage( GetDlgItem( hDlg, IDM_SPIN1 ), BM_SETSTATE,
- GetDlgItem( hDlg, IDM_EDIT1 ), MAKELONG( -1, 11 ) );
-
- // Enable value wrapping
- SendMessage( GetDlgItem( hDlg, IDM_SPIN1 ), BM_SETSTYLE, 1, NULL );
-
- SetDlgItemText( hDlg, IDM_EDIT1, "0" );
- return( TRUE );
- }
- }
-
-
- About VSPIN:
- VSPIN is public domain software and is not officially supported at this
- time. By using the software, the user assumes complete responsibility of the
- use of the software. The author and software are not liable. Period. If the
- user cannot agree to this term, he/she should cease using the software
- immediately and dispose of properly.
- VSPIN is not guarenteed to run on every machine under every circumstance and
- is certainly not guarenteed to run on subsequent releases of Windows NT as-is.
-
- The author may be contacted in the following methods:
-
- America Online E-Mail: PCA MarkG
- Compuserve Mail: 76450,2754
- Internet Mail: pcamarkg@aol.com
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