C / C++ / MFC

HDC m_hdcMem,hdc;
HBITMAP m_Bitmap,m_OldBitmap,hMainBmp;
hdc=GetDesktopWindow()->GetDC()->m_hDC;//GetDC()->m_hDC     m_hdcMem= CreateCompatibleDC(hdc);	
m_Bitmap = CreateCompatibleBitmap(hdc,800,600);
 m_OldBitmap=(HBITMAP) SelectObject(m_hdcMem, m_Bitmap);
BitBlt(m_hdcMem, 0,0,800,600, hdc,0,0,SRCCOPY);
hMainBmp =(HBITMAP) SelectObject(m_hdcMem, m_OldBitmap);
/////Save this snapshot to a file/////
CImage m_Image;
m_Image.Attach(hMainBmp);
m_Image.Save("c:\\test.bmp");
m_Image.Destroy();
DeleteDC(m_hdcMem);
DeleteObject(hMainBmp );
DeleteObject(m_OldBitmap);

<br />
hdc=GetDesktopWindow()->GetDC()->m_hDC;<br />

ashishbhatt wrote:

As you told to check both handles, I did the same and also got both handles right. In both cases it did not show invalid handle.

ashishbhatt wrote:

But I checked other thing that I tried to display some pixels using SetPixel() function but I did not get success.

ashishbhatt wrote:

Do you have any Idea about this problem??

class BankAccount;
class Teller
{
public:
	float checkAccount(BankAccount *bap);
};

#include"Teller.h"
class BankAccount
{
	friend class BankManager;
	friend float Teller::checkAccount(BankAccount* bap);
private:
	float sum;
	short code;

public:
	BankAccount(short _code);
	BankAccount(short _code, float _startSum);

	float getSum(short _code);
	void deposit(float _amount);
	void withdraw(short _code, float _amount);
};

Mark Salsbery
Microsoft MVP - Visual C++

gizmokaka wrote:

what goes instead of the ....; line???

base::show();

class base
{
   base(int a, int b)
   {
      x = a;
      y = b;
   }
};

class derived
{
   derived(int a, int b, int c):z(c)
   {
      how to call base c'tor with a and b ????
      or maybe it's also done in the initialization list???
   }
};

gizmokaka wrote:

maybe it's also done in the initialization list???

gizmokaka wrote:

derived(int a, int b, int c):z(c)

derived(int a, int b, int c):base(a,b), z(c)

class B;
class A
{
  friend class B;
  int i;
public:
	A():i(0){}
};

class B
{
public:
  void changeA(A * pA){ pA->i=5;}
};

void main()
{
  A a;
  B b;
  b.changeA(&a);
}