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Reply To: problem with SendMessageA

#190564
pharaon
Member

The problem is with marshaling. for ansi the code should be
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<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>
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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
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<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>
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it keep showing my symbols at the end of the text like his 머ࢆ洰Հ╈࢐ even after I tried what you said