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GeneralRe: dynamically add a flash object to a C# desktop application Pin
Zap-Man26-Feb-09 5:05
Zap-Man26-Feb-09 5:05 
GeneralRe: dynamically add a flash object to a C# desktop application Pin
EliottA26-Feb-09 5:42
EliottA26-Feb-09 5:42 
GeneralRe: dynamically add a flash object to a C# desktop application Pin
led mike26-Feb-09 7:11
led mike26-Feb-09 7:11 
GeneralRe: dynamically add a flash object to a C# desktop application Pin
led mike26-Feb-09 5:48
led mike26-Feb-09 5:48 
Questioncreate user and role + sql server for existing database programatically Pin
vineesh v26-Feb-09 3:19
vineesh v26-Feb-09 3:19 
AnswerRe: create user and role + sql server for existing database programatically Pin
Jimmanuel26-Feb-09 4:04
Jimmanuel26-Feb-09 4:04 
QuestionDll Import Pin
Alessio Granzotto26-Feb-09 3:13
Alessio Granzotto26-Feb-09 3:13 
AnswerRe: Dll Import Pin
Luc Pattyn26-Feb-09 9:18
sitebuilderLuc Pattyn26-Feb-09 9:18 
Hi,

Some of it looks good, some is less clear. It is always difficult to pinpoint what exactly is wrong; I tend to (1) keep data exchange simple and (2) add logging code on both sides, so I can see which arguments get accross correctly and which don't.

I do have 2 comments:

1.
a native long* can be passed as a managed out long or ref long, it does not need an IntPtr at all. The way your template has it, it is promising the managed world will receive an output pointer, which then natively would require long**
Chances are this is what is causing the error.

2.
I just don't know about szTemplate, I never use [MarshalAs(UnmanagedType.LPStr)] StringBuilder. I prefer a more verbose but easier to understand style as in:
[DllImport("image.dll")]
public static extern long MatchPage(..., StringBuilder szTemplate, ...);

StringBuilder sb=new StringBuilder(1000); // make sure to set initial capacity
MatchPage(..., sb, ...);
string s=sb.ToString();


You must set an initial capacity, that is the size used to allocate the character buffer; and the safe way is to pass that Capacity to the native world so it won't overflow the buffer (similar to strncpy).

Smile | :)
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modified on Sunday, June 12, 2011 8:42 AM

GeneralRe: Dll Import Pin
Alessio Granzotto27-Feb-09 0:42
Alessio Granzotto27-Feb-09 0:42 
AnswerRe: Dll Import Pin
Luc Pattyn27-Feb-09 1:36
sitebuilderLuc Pattyn27-Feb-09 1:36 
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Questionprocess extension Pin
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GeneralRe: process extension Pin
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AnswerRe: How to split a datatable?? Pin
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