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vkbishnoi · Nov 3 '09, 02:30 AM

I tried creating a VC++/MFC dll with a function signature

short SendAT6400Block (short a, LPSTR command, short b);

and using the above pinvoke signature i was able to pass the string successfully to this DLL.

Also i tried these signatures in the VC++/MFC dll

short SendAT6400Block (short a, char* command, short b);
short SendAT6400Block (short a, char command[258], short b);
...

vkbishnoi · Oct 30 '09, 07:08 AM

try this

[DllImport("C:\\ WINDOWS\\system 32\\nt6400.dll" , CharSet = CharSet.Ansi)]
public static extern short SendAT6400Block (short address, string cmd, short irqnum);

vkbishnoi · Oct 30 '09, 06:36 AM

How to call event or delegate asynchronously in C#

If we call Delegate.Invoke () then the handler will get called synchronously. Means till the handler function is completed the control will not return back.

Code:

delegate void Foo();

Foo evtFoo;

evtFoo.Invoke(); //This will not return until the associated handler function is completed

In order to call it async, use BeginInvoke()....

vkbishnoi · Oct 30 '09, 06:05 AM

How to create a vertical scroll bar in C#

Vertical progress bar
------------------------------------------------------------
Derive your class as shown below

Code:

class VertProgress : ProgressBar
{
      override CreateParams CreateParams
      {
           get
           {
                 CreateParams crParam = base.CreateParams;
                 crParam.Style |= 0x04;

...

vkbishnoi · Oct 30 '09, 05:01 AM

Thanks for the suggestion. Actually in production site, this environment variable will hold some important information (as per design) hence it should be visible to only this user account. Can't put it in HKEY_LOCAL_MACH INE\Environment .
Is there any way we can achieve this by code.

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