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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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