change variable initialization logic

Author: hallazzang

examples/syscall/lasterror/syscall.go

@@ -7,23 +7,13 @@ import (
 )
 
 var (
-	libuser32   *windows.LazyDLL
-	libkernel32 *windows.LazyDLL
+	libuser32 = windows.NewLazySystemDLL("user32.dll")
 
-	procMessageBoxW  *windows.LazyProc
-	procGetLastError *windows.LazyProc
+	procMessageBoxW = libuser32.NewProc("MessageBoxW")
 
 	lastError error
 )
 
-func init() {
-	libuser32 = windows.NewLazySystemDLL("user32.dll")
-	libkernel32 = windows.NewLazySystemDLL("kernel32.dll")
-
-	procMessageBoxW = libuser32.NewProc("MessageBoxW")
-	procGetLastError = libkernel32.NewProc("GetLastError")
-}
-
 func messageBox(hWnd uintptr, lpText *uint16, lpCaption *uint16, uType uint32) int32 {
 	var r1 uintptr
 	r1, _, lastError = procMessageBoxW.Call(hWnd, uintptr(unsafe.Pointer(lpText)), uintptr(unsafe.Pointer(lpCaption)), uintptr(uType))

examples/syscall/module/syscall.go

@@ -7,16 +7,10 @@ import (
 )
 
 var (
-	libuser32 *windows.LazyDLL
-
-	procMessageBoxW *windows.LazyProc
-)
-
-func init() {
 	libuser32 = windows.NewLazySystemDLL("user32.dll")
 
 	procMessageBoxW = libuser32.NewProc("MessageBoxW")
-}
+)
 
 func messageBox(hWnd uintptr, lpText *uint16, lpCaption *uint16, uType uint32) int32 {
 	r1, _, _ := procMessageBoxW.Call(hWnd, uintptr(unsafe.Pointer(lpText)), uintptr(unsafe.Pointer(lpCaption)), uintptr(uType))