diff --git a/Core/Buffer.h b/Core/Buffer.h
index c307cea3..697fd4e8 100644
--- a/Core/Buffer.h
+++ b/Core/Buffer.h
@@ -1,4 +1,4 @@
-#ifndef _Buffer_H_
+#ifndef _Buffer_H_
 #define _Buffer_H_
 
 #include "Type.h"
diff --git a/Core/DateTime.cpp b/Core/DateTime.cpp
index cfd75c81..17b62865 100644
--- a/Core/DateTime.cpp
+++ b/Core/DateTime.cpp
@@ -104,7 +104,7 @@ DateTime& DateTime::Parse(int seconds)
 
 DateTime& DateTime::ParseMs(Int64 ms)
 {
-	Parse(ms / 1000LL);
+	Parse((int)(ms / 1000LL));
 	Ms = ms % 1000LL;
 
 	return *this;
@@ -129,7 +129,7 @@ DateTime& DateTime::ParseDays(int days)
     days -= ytd;
 
 	// 按最大每月31天估算，如果超过当月总天数，月份加一
-    Month = (short)(days / 31 + 1);
+    Month = (byte)(days / 31 + 1);
     int mtd = MONTH_TO_DAYS(Year, Month + 1);
     if (days >= mtd) Month++;
 
@@ -137,7 +137,7 @@ DateTime& DateTime::ParseDays(int days)
     mtd = MONTH_TO_DAYS(Year, Month);
 
 	// 今年总天数减去月份天数，得到该月第几天
-    Day = (short)(days - mtd + 1);
+    Day = (byte)(days - mtd + 1);
 
 	return *this;
 }
@@ -353,7 +353,7 @@ void DateTime::Show(bool newLine) const
 	f短全部 M/d/yy HH:mm
 	F长全部 yyyy-MM-dd HH:mm:ss
 */
-cstring DateTime::GetString(byte kind, char* str)
+/*cstring DateTime::GetString(byte kind, char* str)
 {
 	auto& st = *this;
 	switch(kind)
@@ -382,12 +382,12 @@ cstring DateTime::GetString(byte kind, char* str)
 	}
 
 	return str;
-}
+}*/
 
 // 当前时间
 DateTime DateTime::Now()
 {
-	DateTime dt(time(NULL));
+	DateTime dt((int)time(NULL));
 
 	return dt;
 }
diff --git a/Core/DateTime.h b/Core/DateTime.h
index c3f91028..7f7631ae 100644
--- a/Core/DateTime.h
+++ b/Core/DateTime.h
@@ -74,7 +74,7 @@ public:
 	f短全部 M/d/yy HH:mm
 	F长全部 yyyy-MM-dd HH:mm:ss
 	*/
-	cstring GetString(byte kind = 'F', char* str = nullptr);
+	//cstring GetString(byte kind = 'F', char* str = nullptr);
 
 	// 当前时间
 	static DateTime Now();
diff --git a/Core/Random.cpp b/Core/Random.cpp
index 91eb5b41..ff72fefc 100644
--- a/Core/Random.cpp
+++ b/Core/Random.cpp
@@ -8,7 +8,7 @@
 /************************************************ Random ************************************************/
 Random::Random()
 {
-	srand(time(NULL));
+	srand((uint)time(NULL));
 }
 
 Random::Random(uint seed)
diff --git a/Core/String.cpp b/Core/String.cpp
index 6a6b8dfa..c17ced84 100644
--- a/Core/String.cpp
+++ b/Core/String.cpp
@@ -661,7 +661,7 @@ float String::ToFloat() const
 {
 	if(_Length == 0) return 0;
 
-	if(_Arr[_Length] == '\0') return atof(_Arr);
+	if(_Arr[_Length] == '\0') return (float)atof(_Arr);
 
 	// 非零结尾字符串需要特殊处理
 	String s;
diff --git a/Core/TimeSpan.cpp b/Core/TimeSpan.cpp
index 147abe12..a34a93d1 100644
--- a/Core/TimeSpan.cpp
+++ b/Core/TimeSpan.cpp
@@ -7,7 +7,7 @@
 /************************************************ TimeSpan ************************************************/
 TimeSpan::TimeSpan(Int64 ms)
 {
-	_Seconds	= ms / 1000;
+	_Seconds	= (int)(ms / 1000);
 	_Ms	= ms % 1000;
 }
 
diff --git a/Core/Type.h b/Core/Type.h
index cacce0e2..f2ad3e95 100644
--- a/Core/Type.h
+++ b/Core/Type.h
@@ -55,10 +55,19 @@ public:
 //#define ArrayZero(arr) memset(arr, 0, sizeof(arr))
 
 // 弱函数
-//#if defined(__CC_ARM)
-//	#define	WEAK	__weak
-//#elif defined(__GNUC__)
-	#define	WEAK	__attribute__((weak))
-//#endif
+#if defined(__CC_ARM)
+#define	WEAK	__weak
+#elif defined(__GNUC__)
+#define	WEAK	__attribute__((weak))
+//#elif defined(_MSC_VER)
+//	#define	WEAK	__declspec(selectany)
+#else
+#define WEAK
+#endif
+
+#if defined(_MSC_VER)
+//#define itoa	_itoa_s
+//#define sprintf	sprintf_s
+#endif
 
 #endif