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Go lang get current foreground window
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package main | |
import ( | |
"fmt" | |
"syscall" | |
"unsafe" | |
"golang.org/x/sys/windows" | |
) | |
var ( | |
mod = windows.NewLazyDLL("user32.dll") | |
procGetWindowText = mod.NewProc("GetWindowTextW") | |
procGetWindowTextLength = mod.NewProc("GetWindowTextLengthW") | |
) | |
type ( | |
HANDLE uintptr | |
HWND HANDLE | |
) | |
func GetWindowTextLength(hwnd HWND) int { | |
ret, _, _ := procGetWindowTextLength.Call( | |
uintptr(hwnd)) | |
return int(ret) | |
} | |
func GetWindowText(hwnd HWND) string { | |
textLen := GetWindowTextLength(hwnd) + 1 | |
buf := make([]uint16, textLen) | |
procGetWindowText.Call( | |
uintptr(hwnd), | |
uintptr(unsafe.Pointer(&buf[0])), | |
uintptr(textLen)) | |
return syscall.UTF16ToString(buf) | |
} | |
func getWindow(funcName string) uintptr { | |
proc := mod.NewProc(funcName) | |
hwnd, _, _ := proc.Call() | |
return hwnd | |
} | |
func main() { | |
for { | |
if hwnd := getWindow("GetForegroundWindow") ; hwnd != 0 { | |
text := GetWindowText(HWND(hwnd)) | |
fmt.Println("window :", text, "# hwnd:", hwnd) | |
} | |
} | |
} | |
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