Golang 语言调用动态库实现OpenGL及windows的API编程

package main
import (
    "syscall"
)
func callDll(){
    dll32 := syscall.NewLazyDLL("example2.dll")
    println("call dll:",dll32.Name)
    g:=dll32.NewProc("gcd")
    ret, _, _ :=g.Call(uintptr(4),uintptr(8))
    println()
    println("get the result:",ret)
}
func main() {
    callDll()
}
这样我们就可以利用windows的API了，同样可以做GUI的编程了。
那样我们就可以在windows下用GO语言实现曾经的键盘记录等好玩的软件了

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源码：
package walk
import (
 "bytes"
)
import (
 "github.com/lxn/win"
)
type Key uint16
func (k Key) String() string {
 return key2string[k]
}
const (
 KeyLButton           Key = win.VK_LBUTTON
 KeyRButton           Key = win.VK_RBUTTON
 KeyCancel            Key = win.VK_CANCEL
 KeyMButton           Key = win.VK_MBUTTON
 KeyXButton1          Key = win.VK_XBUTTON1
 KeyXButton2          Key = win.VK_XBUTTON2
 KeyBack              Key = win.VK_BACK
 KeyTab               Key = win.VK_TAB
 KeyClear             Key = win.VK_CLEAR
 KeyReturn            Key = win.VK_RETURN
 KeyShift             Key = win.VK_SHIFT
 KeyControl           Key = win.VK_CONTROL
 KeyAlt               Key = win.VK_MENU
 KeyMenu              Key = win.VK_MENU
 KeyPause             Key = win.VK_PAUSE
 KeyCapital           Key = win.VK_CAPITAL
 KeyKana              Key = win.VK_KANA
 KeyHangul            Key = win.VK_HANGUL
 KeyJunja             Key = win.VK_JUNJA
 KeyFinal             Key = win.VK_FINAL
 KeyHanja             Key = win.VK_HANJA
 KeyKanji             Key = win.VK_KANJI
 KeyEscape            Key = win.VK_ESCAPE
 KeyConvert           Key = win.VK_CONVERT
 KeyNonconvert        Key = win.VK_NONCONVERT
 KeyAccept            Key = win.VK_ACCEPT
 KeyModeChange        Key = win.VK_MODECHANGE
 KeySpace             Key = win.VK_SPACE
 KeyPrior             Key = win.VK_PRIOR
 KeyNext              Key = win.VK_NEXT
 KeyEnd               Key = win.VK_END
 KeyHome              Key = win.VK_HOME
 KeyLeft              Key = win.VK_LEFT
 KeyUp                Key = win.VK_UP
 KeyRight             Key = win.VK_RIGHT
 KeyDown              Key = win.VK_DOWN
 KeySelect            Key = win.VK_SELECT
 KeyPrint             Key = win.VK_PRINT
 KeyExecute           Key = win.VK_EXECUTE
 KeySnapshot          Key = win.VK_SNAPSHOT
 KeyInsert            Key = win.VK_INSERT
 KeyDelete            Key = win.VK_DELETE
 KeyHelp              Key = win.VK_HELP
 Key0                 Key = 0x30
 Key1                 Key = 0x31
 Key2                 Key = 0x32
 Key3                 Key = 0x33
 Key4                 Key = 0x34
 Key5                 Key = 0x35
 Key6                 Key = 0x36
 Key7                 Key = 0x37
 Key8                 Key = 0x38
 Key9                 Key = 0x39
 KeyA                 Key = 0x41
 KeyB                 Key = 0x42
 KeyC                 Key = 0x43
 KeyD                 Key = 0x44
 KeyE                 Key = 0x45
 KeyF                 Key = 0x46
 KeyG                 Key = 0x47
 KeyH                 Key = 0x48
 KeyI                 Key = 0x49
 KeyJ                 Key = 0x4A
 KeyK                 Key = 0x4B
 KeyL                 Key = 0x4C
 KeyM                 Key = 0x4D
 KeyN                 Key = 0x4E
 KeyO                 Key = 0x4F
 KeyP                 Key = 0x50
 KeyQ                 Key = 0x51
 KeyR                 Key = 0x52
 KeyS                 Key = 0x53
 KeyT                 Key = 0x54
 KeyU                 Key = 0x55
 KeyV                 Key = 0x56
 KeyW                 Key = 0x57
 KeyX                 Key = 0x58
 KeyY                 Key = 0x59
 KeyZ                 Key = 0x5A
 KeyLWin              Key = win.VK_LWIN
 KeyRWin              Key = win.VK_RWIN
 KeyApps              Key = win.VK_APPS
 KeySleep             Key = win.VK_SLEEP
 KeyNumpad0           Key = win.VK_NUMPAD0
 KeyNumpad1           Key = win.VK_NUMPAD1
 KeyNumpad2           Key = win.VK_NUMPAD2
 KeyNumpad3           Key = win.VK_NUMPAD3
 KeyNumpad4           Key = win.VK_NUMPAD4
 KeyNumpad5           Key = win.VK_NUMPAD5
 KeyNumpad6           Key = win.VK_NUMPAD6
 KeyNumpad7           Key = win.VK_NUMPAD7
 KeyNumpad8           Key = win.VK_NUMPAD8
 KeyNumpad9           Key = win.VK_NUMPAD9
 KeyMultiply          Key = win.VK_MULTIPLY
 KeyAdd               Key = win.VK_ADD
 KeySeparator         Key = win.VK_SEPARATOR
 KeySubtract          Key = win.VK_SUBTRACT
 KeyDecimal           Key = win.VK_DECIMAL
 KeyDivide            Key = win.VK_DIVIDE
 KeyF1                Key = win.VK_F1
 KeyF2                Key = win.VK_F2
 KeyF3                Key = win.VK_F3
 KeyF4                Key = win.VK_F4
 KeyF5                Key = win.VK_F5
 KeyF6                Key = win.VK_F6
 KeyF7                Key = win.VK_F7
 KeyF8                Key = win.VK_F8
 KeyF9                Key = win.VK_F9
 KeyF10               Key = win.VK_F10
 KeyF11               Key = win.VK_F11
 KeyF12               Key = win.VK_F12
 KeyF13               Key = win.VK_F13
 KeyF14               Key = win.VK_F14
 KeyF15               Key = win.VK_F15
 KeyF16               Key = win.VK_F16
 KeyF17               Key = win.VK_F17
 KeyF18               Key = win.VK_F18
 KeyF19               Key = win.VK_F19
 KeyF20               Key = win.VK_F20
 KeyF21               Key = win.VK_F21
 KeyF22               Key = win.VK_F22
 KeyF23               Key = win.VK_F23
 KeyF24               Key = win.VK_F24
 KeyNumlock           Key = win.VK_NUMLOCK
 KeyScroll            Key = win.VK_SCROLL
 KeyLShift            Key = win.VK_LSHIFT
 KeyRShift            Key = win.VK_RSHIFT
 KeyLControl          Key = win.VK_LCONTROL
 KeyRControl          Key = win.VK_RCONTROL
 KeyLAlt              Key = win.VK_LMENU
 KeyLMenu             Key = win.VK_LMENU
 KeyRAlt              Key = win.VK_RMENU
 KeyRMenu             Key = win.VK_RMENU
 KeyBrowserBack       Key = win.VK_BROWSER_BACK
 KeyBrowserForward    Key = win.VK_BROWSER_FORWARD
 KeyBrowserRefresh    Key = win.VK_BROWSER_REFRESH
 KeyBrowserStop       Key = win.VK_BROWSER_STOP
 KeyBrowserSearch     Key = win.VK_BROWSER_SEARCH
 KeyBrowserFavorites  Key = win.VK_BROWSER_FAVORITES
 KeyBrowserHome       Key = win.VK_BROWSER_HOME
 KeyVolumeMute        Key = win.VK_VOLUME_MUTE
 KeyVolumeDown        Key = win.VK_VOLUME_DOWN
 KeyVolumeUp          Key = win.VK_VOLUME_UP
 KeyMediaNextTrack    Key = win.VK_MEDIA_NEXT_TRACK
 KeyMediaPrevTrack    Key = win.VK_MEDIA_PREV_TRACK
 KeyMediaStop         Key = win.VK_MEDIA_STOP
 KeyMediaPlayPause    Key = win.VK_MEDIA_PLAY_PAUSE
 KeyLaunchMail        Key = win.VK_LAUNCH_MAIL
 KeyLaunchMediaSelect Key = win.VK_LAUNCH_MEDIA_SELECT
 KeyLaunchApp1        Key = win.VK_LAUNCH_APP1
 KeyLaunchApp2        Key = win.VK_LAUNCH_APP2
 KeyOEM1              Key = win.VK_OEM_1
 KeyOEMPlus           Key = win.VK_OEM_PLUS
 KeyOEMComma          Key = win.VK_OEM_COMMA
 KeyOEMMinus          Key = win.VK_OEM_MINUS
 KeyOEMPeriod         Key = win.VK_OEM_PERIOD
 KeyOEM2              Key = win.VK_OEM_2
 KeyOEM3              Key = win.VK_OEM_3
 KeyOEM4              Key = win.VK_OEM_4
 KeyOEM5              Key = win.VK_OEM_5
 KeyOEM6              Key = win.VK_OEM_6
 KeyOEM7              Key = win.VK_OEM_7
 KeyOEM8              Key = win.VK_OEM_8
 KeyOEM102            Key = win.VK_OEM_102
 KeyProcessKey        Key = win.VK_PROCESSKEY
 KeyPacket            Key = win.VK_PACKET
 KeyAttn              Key = win.VK_ATTN
 KeyCRSel             Key = win.VK_CRSEL
 KeyEXSel             Key = win.VK_EXSEL
 KeyErEOF             Key = win.VK_EREOF
 KeyPlay              Key = win.VK_PLAY
 KeyZoom              Key = win.VK_ZOOM
 KeyNoName            Key = win.VK_NONAME
 KeyPA1               Key = win.VK_PA1
 KeyOEMClear          Key = win.VK_OEM_CLEAR
)
type Modifiers byte
func (m Modifiers) String() string {
 return modifiers2string[m]
}
var modifiers2string = map[Modifiers]string{
 ModShift:                       "Shift",
 ModControl:                     "Ctrl",
 ModControl | ModShift:          "Ctrl+Shift",
 ModAlt:                         "Alt",
 ModAlt | ModShift:              "Alt+Shift",
 ModAlt | ModControl | ModShift: "Alt+Ctrl+Shift",
}
const (
 ModShift Modifiers = 1 << iota
 ModControl
 ModAlt
)
func ModifiersDown() Modifiers {
 var m Modifiers
 if ShiftDown() {
 m |= ModShift
 }
 if ControlDown() {
 m |= ModControl
 }
 if AltDown() {
 m |= ModAlt
 }
 return m
}
type Shortcut struct {
 Modifiers Modifiers
 Key       Key
}
func (s Shortcut) String() string {
 m := s.Modifiers.String()
 if m == "" {
 return s.Key.String()
 }
 b := new(bytes.Buffer)
 b.WriteString(m)
 b.WriteRune('+')
 b.WriteString(s.Key.String())
 return b.String()
}
func AltDown() bool {
 return win.GetKeyState(int32(KeyAlt))>>15 != 0
}
func ControlDown() bool {
 return win.GetKeyState(int32(KeyControl))>>15 != 0
}
func ShiftDown() bool {
 return win.GetKeyState(int32(KeyShift))>>15 != 0
}