ID: Q110989
2.00 3.00 WINDOWS kbprg kbbuglist
The information in this article applies to:
- Standard and Professional Editions of Microsoft Visual Basic
programming system for Windows, versions 2.0 and 3.0
You will receive an "Out of Memory" error message if you attempt to add more than approximately 36 HEdit or approximately 50 BEdit Pen Controls to an individual Form.
You can edit in only one control at a time, so use only one of each of the Pen Controls on top of multiple Labels or Picture Box Controls. This will display the result of the edit when you move the focus to another control.
The examples in the More Information section below will demonstrate how to do this for each of the Pen Controls.
Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This problem has been corrected in Visual Basic version 4.0.
Here are two examples showing how to work around this bug:
The following example demonstrates how to use multiple Picture Boxes and one HEdit Control with the DelayRecog = True. This will allow the user to input signatures into a field which will then remain as written, no recognition is performed.
1. Start a new project in Visual Basic. Form1 is created by default.
2. Add the following controls, and set the indicated properties:
Control Property Value
----------------------------------------
Picture Box Name PictureB
Index 0
AutoRedraw True
Picture Box Name PictureB
Index 1
AutoRedraw True
HEdit Control Name HEdit1
DelayRecog True
Text <blank>
Command Button Name Command1
Caption Clear
'Enter each of the following Declare statements on one, single line:
Declare Function GetDC Lib "USER" (ByVal hWnd As Integer) As Integer
Declare Function BitBlt Lib "GDI" (ByVal hDestDC As Integer,
ByVal x As Integer, ByVal y As Integer, ByVal nWidth As Integer,
ByVal nHeight As Integer, ByVal hSrsDC As Integer,
ByVal xSrc As Integer, ByVal ySrc As Integer, ByVal dwRop) As Integer
Const SRCCOPY &H00CC0020& ' Will be used in the call to BitBlt
Dim LastPos As Integer ' Will be used to keep track of the
' last edited field.
Dim InkArray(2) As String ' This array will be used to store the
' InkDataString for each of the fields.
Sub Command1_Click ()
HEdit1.InkDataString = "" ' Clear the field.
End Sub
Sub Form_Load ()
Call PictureB_Click(0) ' Position the HEdit control over the
End Sub ' first field.
Sub Picture1_Click (index As Integer)
' Copy the image in the HEdit control to the Picture Box
destDC = GetDC(HEdit.hWnd)
' Enter the following three lines as one, single line:
dummy% = BitBlt(PictureB(LastPos).HDC, 0, 0,
PictureB(LastPos).ScaleWidth-2, PictureB(LastPos).ScaleHeight-2,
destDC, 1, 1)
InkArray(LastPos) = HEdit1.InkDataString
' Save the Ink data for this field. It will be reassigned
' to the HEdit control the next time that field is selected
' and the HEdit control is positioned on top of it.
LastPos = index ' Update LastPos to the current field.
HEdit1.Visible = False ' This prevent a flicker when the
' control is moved.
HEdit1.Top = PictureB(index).Top ' Move the HEdit Control on
HEdit1.Left = PictureB(index).Left ' top of the selected Picture
HEdit1.Width = PictureB(index).Width ' box field.
HEdit1.Height = PictureB(index).Height
HEdit1.InkDataString = InkArray(index) ' Reset the Ink in the
' Hedit Control to that
' stored for this field.
HEdit1.Visible = True
End Sub
The following example demonstrates how to use multiple Labels and one HEdit Control with DelayRecog = False. This works using a BEdit control as well. This allows the user to input hand-written characters into a field where those characters will then be recognized and converted into font characters.
1. Start a new project in Visual Basic. Form1 is created by default.
2. Add the following controls, and set the indicated properties:
Control Property Value
-----------------------------------------------------------
Label Name LabelF
Index 0
Caption <blank>
Label Name LabelF
Index 1
Caption <blank>
HEdit Control Name HEdit1
DelayRecog False
Text <blank>
Dim LastPos As Integer
Sub Form_Load ()
Call LabelF_Click (0)
End Sub
Sub LabelF_Click (index As Integer)
LabelF(LastPos).Caption = HEdit.Text ' Copy the contents of
' the HEdit Control to the
' Label Control.
LastPos = index ' Update LastPos to the current field.
HEdit1.Visible = False ' This prevent a flicker when the
' control is moved.
HEdit1.Top = LabelF(index).Top ' Move the HEdit Control on
HEdit1.Left = LabelF(index).Left ' top of the selected Picture
HEdit1.Width = LabelF(index).Width ' Box field.
HEdit1.Height = LabelF(index).Height
HEdit1.Text = LabelF(index).Caption ' Reset the Ink in the HEdit
' Control to that stored for
' this field.
HEdit1.Visible = True
End Sub
Keywords : PrgCtrlsCus kbbuglist
Version : 2.00 3.00
Platform : WINDOWS
Solution Type : kbfixLast Reviewed: November 1, 1997