在64位转换期间，CString值被截断

Question

当我从Ulong64转换为cstring值时会被64位截断，任何人都可以帮我解决这个问题吗？

HMONITOR hmonitor64;  // Hmonitor decl  
hmonitor64 = (HMONITOR)0x0000000300290eaf;// initialize to big value
ULONG64 lmonitor64;
CString strMonitor64;
lmonitor64 = (ULONG64)hmonitor64; // typecasted to long 
strMonitor64.Format(_T("%lu"), lmonitor64);  // value gets truncated in cstring

Answer 1

格式化ULONG64的正确方法如下：

HMONITOR hmonitor64;  // Hmonitor decl  
hmonitor64 = (HMONITOR)0x0000000300290eaf;// initialize to big value
ULONG64 lmonitor64;
CString strMonitor64;
lmonitor64 = (ULONG64)hmonitor64; // typecasted to long 
strMonitor64.Format(_T("%I64u"), lmonitor64);  // value gets truncated in cstring