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// 7 february 2014
package ui
import (
"syscall"
"unsafe"
)
var (
user32 = syscall.NewLazyDLL("user32.dll")
kernel32 = syscall.NewLazyDLL("kernel32.dll")
gdi32 = syscall.NewLazyDLL("gdi32.dll")
comctl32 *syscall.LazyDLL // comctl32 not defined here; see comctl_windows.go
msimg32 = syscall.NewLazyDLL("msimg32.dll")
)
type _HANDLE uintptr
type _HWND _HANDLE
type _HBRUSH _HANDLE
type _HMENU _HANDLE
const (
_NULL = 0
_FALSE = 0 // from windef.h
_TRUE = 1 // from windef.h
)
// In MSDN, _LPARAM and _LRESULT are listed as signed pointers, however their interpretation is message-specific. Ergo, just cast them yourself; it'll be the same. (Thanks to Tv` in #go-nuts for helping me realize this.)
type _WPARAM uintptr
type _LPARAM uintptr
type _LRESULT uintptr
func (w _WPARAM) LOWORD() uint16 {
// according to windef.h
return uint16(w & 0xFFFF)
}
func (w _WPARAM) HIWORD() uint16 {
// according to windef.h
return uint16((w >> 16) & 0xFFFF)
}
func _LPARAMFromString(str string) _LPARAM {
return _LPARAM(unsafe.Pointer(syscall.StringToUTF16Ptr(str)))
}
// microsoft's header files do this
func _MAKEINTRESOURCE(what uint16) uintptr {
return uintptr(what)
}
func (l _LPARAM) _X() int32 {
// according to windowsx.h
loword := uint16(l & 0xFFFF)
short := int16(loword) // convert to signed...
return int32(short) // ...and sign extend
}
func (l _LPARAM) _Y() int32 {
// according to windowsx.h
hiword := uint16((l & 0xFFFF0000) >> 16)
short := int16(hiword) // convert to signed...
return int32(short) // ...and sign extend
}
type _POINT struct {
X int32
Y int32
}
type _RECT struct {
Left int32
Top int32
Right int32
Bottom int32
}
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