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AnswerRe: Workaround global variables? Pin
Dave Kreskowiak5-Sep-07 9:08
mveDave Kreskowiak5-Sep-07 9:08 
Questionsizeof Pin
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AnswerRe: sizeof Pin
TJoe5-Sep-07 8:50
TJoe5-Sep-07 8:50 
GeneralRe: sizeof Pin
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sitebuilderLuc Pattyn5-Sep-07 10:02 
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QuestionProblem passing data to an activeX Pin
Paolo Vernazza5-Sep-07 6:55
Paolo Vernazza5-Sep-07 6:55 
AnswerRe: Problem passing data to an activeX Pin
TJoe5-Sep-07 8:23
TJoe5-Sep-07 8:23 
Hi Paolo,

The ActiveX is expecting a pointer to, presumably, an array of long values. But from C# you are only passing a single Int32. You need to use an IntPtr to pass the data back and forth, like so:

// Create buffer
Int32[] buffer = new Int32[10];
buffer[5] = 1;

// Allocate and copy to unmanaged memory
IntPtr ptr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(Int32)) * 10);
Marshal.Copy(buffer, 0, ptr, 10);

// Change buffer, so we can see that the ptr has restores the
//   old value
buffer[5] = 2;

// Copy from unmanged memory back to array
Marshal.Copy(ptr, buffer, 0, 10);

// Free memory, or else we will leak it
Marshal.FreeHGlobal(ptr);


Note: The Marshal class is in the System.Runtime.InteropServices namespace.

Take care,
Tom

-----------------------------------------------
Check out my blog at http://tjoe.wordpress.com

GeneralRe: Problem passing data to an activeX Pin
Paolo Vernazza6-Sep-07 1:57
Paolo Vernazza6-Sep-07 1:57 
GeneralRe: Problem passing data to an activeX Pin
TJoe6-Sep-07 2:13
TJoe6-Sep-07 2:13 
GeneralRe: Problem passing data to an activeX Pin
Paolo Vernazza6-Sep-07 4:33
Paolo Vernazza6-Sep-07 4:33 
GeneralRe: Problem passing data to an activeX Pin
TJoe6-Sep-07 5:08
TJoe6-Sep-07 5:08 
QuestionHow to limit maximum size of other windows? Pin
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AnswerRe: How to limit maximum size of other windows? Pin
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GeneralRe: How to limit maximum size of other windows? Pin
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QuestionRegex replace question Pin
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AnswerRe: Regex replace question Pin
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Questionrow doesn't get deleted Pin
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QuestionVisual Studio Menu Layout Pin
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AnswerRe: Visual Studio Menu Layout Pin
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QuestionForm problem Pin
sajid.salim.khan5-Sep-07 4:52
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AnswerRe: Form problem Pin
Christian Graus5-Sep-07 5:07
protectorChristian Graus5-Sep-07 5:07 
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QuestionExcel Layout change Pin
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