Use WinError instead of Errno

src/crystal/system/win32/time.cr

@@ -1,4 +1,5 @@
 require "c/winbase"
+require "winerror"
 
 module Crystal::System::Time
   # Win32 epoch is 1601-01-01 00:00:00 UTC
@@ -13,7 +14,7 @@ module Crystal::System::Time
   # TODO: For now, this method returns the UTC offset currently in place, ignoring *seconds*.
   def self.compute_utc_offset(seconds : Int64) : Int32
     ret = LibC.GetTimeZoneInformation(out zone_information)
-    raise Errno.new("GetTimeZoneInformation") if ret == -1
+    raise WinError.new("GetTimeZoneInformation") if ret == -1
 
     zone_information.bias.to_i32 * -60
   end
@@ -31,15 +32,15 @@ module Crystal::System::Time
   @@performance_frequency : Int64 = begin
     ret = LibC.QueryPerformanceFrequency(out frequency)
     if ret == 0
-      raise Errno.new("QueryPerformanceFrequency")
+      raise WinError.new("QueryPerformanceFrequency")
     end
 
     frequency
   end
 
   def self.monotonic : {Int64, Int32}
     if LibC.QueryPerformanceCounter(out ticks) == 0
-      raise Errno.new("QueryPerformanceCounter")
+      raise WinError.new("QueryPerformanceCounter")
     end
 
     {ticks / @@performance_frequency, (ticks.remainder(NANOSECONDS_PER_SECOND) * NANOSECONDS_PER_SECOND / @@performance_frequency).to_i32}

src/winerror.cr

@@ -1,3 +1,5 @@
+require "c/winapi"
+
 class WinError < Errno
   # NOTE: `get_last_error` must be called BEFORE an instance of this class
   # is malloced as it would change the "last error" to SUCCESS