PlgBlt question - C / C++ / MFC Discussion Boards

Re: How do i dynamically acces method export in CLASS

Naveen20-Apr-06 1:08

20-Apr-06 1:08

see this thread
http://www.codeproject.com/script/comments/forums.asp?forumid=1647&Page=2&userid=1599046&mode=all&select=1404839&df=100&tid=1404839#xx1404839xx[^]

nave

Re: How do i dynamically acces method export in CLASS

Killer320-Apr-06 1:28

Killer3

20-Apr-06 1:28

Hi naveen !

can u advise what exactly i need to do ?
Use this API to get the address of a function that returns an instance of the class that you wish to access dynamically.
For eg:

The function will be something like this...

void* FUNC_EXPORT CreateInstance()
{ return static_cast< void*> (new SomeClass);
}
Use GetProcAddress to get the address of this function

for thendral

Re: How do i dynamically acces method export in CLASS

Naveen20-Apr-06 2:31

Naveen

20-Apr-06 2:31

instead of returning the void* u can return the pointer to the class

say

SomeClass* FUNC_EXPORT CreateInstance()
{ return static_cast< void*> (new SomeClass);
}

them u can access the functions of that clas using the pointer obtained..

nave

Re: How do i dynamically acces method export in CLASS

Killer320-Apr-06 4:09

Killer3

20-Apr-06 4:09

Iam not in control of the situation.
Can i have a sample code that achieves it?
class __declspec(dllexport) MyClass
{
public:
static char* LSGDecrypt(const char* key,const char* hex);
static char* LSGEncrypt(const char* key,const char* source);
}

The above class is export in a dll .
So should i add new function to the dll ?

Iam about access a static function

So is that required to instantiate the class object.

HINSTANCE hDLL; // Handle to DLL
LPFNDLLFUNC1 lpfnDllFunc1; // Function pointer
char* key = new char [50];
key ="KEYVAULE";
char* strPlain = new char [50];
strPlain="password";
char* strResult = new char [50];
DWORD dwrd =NULL;
hDLL = LoadLibrary("Mydll.dll");
if (hDLL != NULL)
{
lpfnDllFunc1 = (LPFNDLLFUNC1)GetProcAddress(hDLL,"LSGEncrypt");
if (lpfnDllFunc1 ==NULL) // Fails here? so DLL is freed up?
{
FreeLibrary(hDLL);
}
else
strResult = lpfnDllFunc1("killer" ,"strikes HERE");

}

Thanks

for thendral

Capturing Desktop Events

atimpoo19-Apr-06 23:56

atimpoo

19-Apr-06 23:56

Hi All,

Can anyone suggest me how to capture Desktop and record it?

Thanks in advance,
Poornima

Re: Capturing Desktop Events

Naveen20-Apr-06 0:55

Naveen

20-Apr-06 0:55

what u want is to take a screen shot of the desktop and save it as bitmap.. just search on the code project..u will find many samples

nave

How to Change the Control Focus on MSFlex Grid Control

kiran janaswamy19-Apr-06 23:18

kiran janaswamy

19-Apr-06 23:18

hi all,

I want to change the selected Full Row of the MSFlexGrid accordingly when mouse changes its cursor to next Row. I mean when Mouse is moved to the Second Row then the Current Selection must be Second Row.

In general the Selection of the Flex Grid is Static and does not depend on the Mouse Move. please help me out for this solution.

thanks,
uday.

uday kiran

uday kiran

PlgBlt question

YaronNir19-Apr-06 23:11

YaronNir

19-Apr-06 23:11

Hi all,

I know I can use PlgBlt to rotate a defined rectangle, but i am not sure on how to use it properly, meaning i want to rotate a drawn rectanle (a rectangle which is drawn on a dialog using the method OnPaint) in 30 degrees.
The question is how to maintain the drawing, for example to to erase the old rectangle place, and how to draw the new rectangle place using the PlgBlt method...

code snippet could be nice Smile | :)

thanks in advanced

Yaron

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