C / C++ / MFC

// m_Font is a class member of a dialog.

 m_Font.CreateFont( 15, 0, 0, 0, FW_BOLD, FALSE, FALSE, 0,
                    DEFAULT_CHARSET, OUT_CHARACTER_PRECIS,
                    CLIP_CHARACTER_PRECIS, DEFAULT_QUALITY,
                    DEFAULT_PITCH | FF_DONTCARE,  _T("Arial") );
...
// somewhere in the paint.
 HFONT hfontOld;
 hfontOld = (HFONT)SelectObject(dc.m_hDC, m_Font);
// do something... with the DC ( draw the text.
 ::SelectObject(dc.m_hDC, hfontOld);
...

SetItemState(hItem,TVIS_SELECTED,TVIS_SELECTED);

SetItemState(hItem,0,TVIS_SELECTED);

#include <windows.h>
#include <iostream>
#include <sys/types.h>
#include <sys/stat.h>
 
using namespace std;
 
bool exists_drive(const char letter)
{
  char nul_file[]="#:\\NUL";
  nul_file[0]=letter;
 
  DWORD error_mode=::SetErrorMode(0);
  ::SetErrorMode(error_mode|SEM_FAILCRITICALERRORS);
 
  struct _stat st;
  int res=_stat(nul_file,&st)==0;
 
  ::SetErrorMode(error_mode);
 
  return res!=0;
}
 
int main(void)
{
  for(char drive='A';drive<='Z';++drive){
    if(exists_drive(drive)){
      cout<<drive<<": OK"<<endl;
    }
    else{
      cout<<drive<<": empty"<<endl;
    }
  }
 
  return 0;
}