C / C++ / MFC

BOOL m_bClicked=FALSE;

	LRESULT OnLButtonDown(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
	{
		m_bClicked=TRUE;
		
		return 0;
	}
	LRESULT OnLButtonUP(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
	{
		m_bClicked=FALSE;


		return 0;
	}

        LRESULT OnMouseMove(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
        {
                if(m_bClicked)
                {
                      //redraw code
                }
        }

(WM_MOVE, WM_MOVING, WM_PAINT)

field1 = (data & 0x0F);
field2 = (data & 0x10) >> 4;
field3 = (data & 0xE0) >> 5;

«_Superman_» wrote:

field3 = (data & 0xE0) >> 5;

field3 = data>> 5;

struct BitField
{
  unsigned int f1:4;
  unsigned int f2:1;
  unsigned int f3:3;
};

union MyData
{
  unsigned char data;
  BitField bf;
};

int main(int argc, char *argv[])
{
  unsigned char data= rand();


  int field1, field2, field3;

  // using SHIFT and AND operators
  field1 =  data & 0xF;
  field2 = (data >> 4) & 1;
  field3 = data >> 5;

  printf("data=%d\n", data);
  printf("(1) fields: %d, %d, %d\n", field1, field2, field3);

  // using union and bitfield struct
  MyData md;
  md.data = data;

  field1 = md.bf.f1;
  field2 = md.bf.f2;
  field3 = md.bf.f3;
  printf("(2) fields: %d, %d, %d\n", field1, field2, field3);
  return 0;
}