908_____________________________________________ 14

if (  )
(

if (Application->MessageBox(

"      ?",
"    ",
MB_YESNOCANCEL + MB_ICONQUESTION) != IDYES)
{

DataSet->Cancel() ;

Abort();

)

else
(

Application->MessageBox(" ","", MB ICONSTOP);

Abort() ;

)

      .

14.19   

	 / 	
	extern PACKAGE void Beep(void) C++Builder,    	SysUtils.hpp
	BOOL Beep(DWORD dwFreq, DWORD dwDuration); API Windows,   Windows NT,      dwFreq    dwDuration ;	
MessageBeep	BOOL MessageBeep(UINT uType); API Windows,     uType	"
PlaySound	BOOL PlaySound(LPCSTR pszSound, HMODULE hmod, DWORD fdwSound) API Windows,     ,    ,    	mmsystem.hpp



      5   5.2.1.