Navigation Menu

[pharaon]

yes

[pharaon]

i did but couldn’t find any thing

[pharaon]

that is the exception i get

Warning: A StringBuilder buffer has been overflowed by unmanaged code.  The process may become unstable.  Insufficient capacity allocated to the StringBuilder before marshaling it.

[pharaon]

it work but some times i give me this message A StringBuilder buffer has been overflowed by unmanaged code

[pharaon]

    Declare Unicode Function SendMessage Lib "USER32" Alias "SendMessageW" (ByVal hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal lParam As StringBuilder) As Integer

    Declare Auto Function SendMessage Lib "USER32" (ByVal hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal lParam As Integer) As Integer

[pharaon]

still give me the same error

[pharaon]

this is the code im using

Dim iLineIndex As Integer = SendMessage(hwnd, EM_LINEINDEX, ilastLine, 0)
Dim iLineLength As Integer = SendMessage(hwnd, EM_LINELENGTH, iLineIndex, 0)
if iLineLength = 0 return Nothing ' or return ""
Dim sb As StringBuilder = New StringBuilder(iLineLength)
sb.Append(ChrW(iLineLength))
sb.Length = iLineLength
SendMessage(hwnd, EM_GETLINE, ilastLine, sb)

[pharaon]

ok

[pharaon]

chike what is the use of the two declaration???

Declare Unicode Function SendMessage Lib "USER32" Alias "SendMessageW" _
     (ByVal hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer,
     ByVal lParam As StringBuilder) As Integer

Declare Auto Function SendMessage Lib "USER32" _
     (ByVal hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer,
     ByVal lParam As Integer) As Integer

 

will I use both or just one of them?

[pharaon]

this one work fine thanks

[pharaon]

    Declare Auto Function SendMessage Lib "USER32" (ByVal hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal lParam As StringBuilder) As Integer

Dim strBuffer As New StringBuilder(1024)
strBuffer.Append(Chr(1024 And 255))
        strBuffer.Append(Chr(1024 / 256))

return symbol

Declare Auto Function SendMessage Lib "USER32" (ByVal hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal lParam As StringBuilder) As Integer

Dim strBuffer As New StringBuilder(1024)
        strBuffer.Append(1024)

return nothing

    Declare Unicode Function SendMessage Lib "USER32" Alias "SendMessageW" (ByVal hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal lParam As StringBuilder) As Integer


Dim strBuffer As New StringBuilder(1024)
strBuffer.Append(Chr(1024 And 255))
        strBuffer.Append(Chr(1024 / 256))

 

return nothing

    Declare Unicode Function SendMessage Lib "USER32" Alias "SendMessageW" (ByVal hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal lParam As StringBuilder) As Integer

Dim strBuffer As New StringBuilder(1024)
        strBuffer.Append(ChrW(1024))

 

 

return symbol

 

 

[pharaon]

The problem is with marshaling. for ansi the code should be
<div id=”wpshdo_6″ class=”wp-synhighlighter-outer”>
<div id=”wpshdt_6″ class=”wp-synhighlighter-expanded”>
<table border=”0″ width=”100%”>
<tbody>
<tr>
<td align=”left” width=”80%”>Code</td>
<td align=”right”> </td>
</tr>
</tbody>
</table>
</div>
<div id=”wpshdi_6″ class=”wp-synhighlighter-inner” style=”display: block;”>
<div class=”vbnet” style=”font-family: monospace;”>strBuffer.<span class=”me1″>Append</span><span class=”br0″>(</span><span class=”kw7″>Chr</span><span class=”br0″>(</span>1024 <span class=”kw5″>And</span> 255<span class=”br0″>)</span><span class=”br0″>)</span> strBuffer.<span class=”me1″>Append</span><span class=”br0″>(</span><span class=”kw7″>Chr</span><span class=”br0″>(</span><span class=”nu0″>1024</span> <span class=”sy0″>/</span> <span class=”nu0″>256</span><span class=”br0″>)</span><span class=”br0″>)</span></div>
</div>
</div>
Because the buffer is marshaled from unicode to anso on it’s way out Char by Char. 1024 fits in a Char which is 2 byte unicode but when marshaled the high byte is lost. or somehow converted I suggest to declare and use SendMessage as follows, since the edit control is unicode anyway
<div id=”wpshdo_7″ class=”wp-synhighlighter-outer”>
<div id=”wpshdt_7″ class=”wp-synhighlighter-expanded”>
<table border=”0″ width=”100%”>
<tbody>
<tr>
<td align=”left” width=”80%”>Code</td>
<td align=”right”> </td>
</tr>
</tbody>
</table>
</div>
<div id=”wpshdi_7″ class=”wp-synhighlighter-inner” style=”display: block;”>
<div class=”vbnet” style=”font-family: monospace;”><span class=”kw6″>Declare</span> <span class=”kw1″>Unicode</span> <span class=”kw6″>Function</span> SendMessage Lib <span class=”st0″>”USER32″</span> <span class=”kw1″>Alias</span> <span class=”st0″>”SendMessageW”</span> _ <span class=”br0″>(</span><span class=”kw2″>ByVal</span> hwnd <span class=”kw2″>As</span> IntPtr, <span class=”kw2″>ByVal</span> wMsg <span class=”kw2″>As</span> <span class=”kw4″>Integer</span>, <span class=”kw2″>ByVal</span> wParam <span class=”kw2″>As</span> <span class=”kw4″>Integer</span>, <span class=”kw2″>ByVal</span> lParam <span class=”kw2″>As</span> StringBuilder<span class=”br0″>)</span> <span class=”kw2″>As</span> <span class=”kw4″>Integer</span> strBuffer.<span class=”me1″>Append</span><span class=”br0″>(</span><span class=”kw7″>ChrW</span><span class=”br0″>(</span><span class=”nu0″>1024</span><span class=”br0″>)</span><span class=”br0″>)</span></div>
</div>
</div>

it keep showing my symbols at the end of the text like his 머ࢆ洰Հ╈࢐ even after I tried what you said

[pharaon]

i didn’t try this yet

but right now when I type 123 in the room I get this 123꧐첼ಬ

[pharaon]

now it get just 63 letter

[pharaon]

ok now I know what is the problem

it’s the net framework version it have to be 3.5

when it’s 3.5 every thing work just fine

but when it’s 4 it doesn’t work and my app have to be net framework 4

so is there any way to fix this?

[Author]

Posts