英文:
Go syscall call windows
问题
我目前正在尝试在Go语言中使用user32.dll的EnumWindows函数，但似乎无法正常工作。
var (
user32 = syscall.NewLazyDLL("user32.dll")
procEnumWindows = user32.NewProc("EnumWindows")
)
func EnumWindows() int {
ret, _, _ := procEnumWindows.Call(
syscall.NewCallback(enumWindowsProc),
uintptr(0),
)
return int(ret)
}
func enumWindowsProc(hwnd syscall.Handle, lparam uintptr) bool {
return true
}
调用EnumWindows函数会出现以下错误：
panic: compileCallback: output parameter size is wrong
我不确定应该如何使用syscall包... 我似乎找不到足够的文档。
在MSDN文档页面上，它说回调函数应该返回一个BOOL，而这正是我正在做的吗？
英文:
Im currently trying to use user32.dll EnumWindows on Go but seems to not be working
var(
user32 = syscall.NewLazyDLL("user32.dll")
procEnumWindows = user32.NewProc("EnumWindows")
)
func EnumWindows() int {
ret, _, _ := procEnumWindows.Call(
syscall.NewCallback(enumWindowsProc),
uintptr(0),
)
return int(ret)
}
func enumWindowsProc(hwnd syscall.Handle, lparam uintptr) bool {
return true
}
Calling EnumWindows will give the following error:
panic: compileCallback: output parameter size is wrong
Im not sure how should I use the syscall package... I cant seem to find enough documentation on it
On the MSDN doc page it says that the callback should return a BOOL and thats what I am doing?
答案1
得分: 3
BOOL在WinAPI中被声明为typedef int BOOL。所以它与Go语言的bool类型不匹配。规范甚至没有提到它的大小是多少。它可能是1字节，但没有明确说明。你应该使用int32代替。
英文:
BOOL in WinAPI is declared as typedef int BOOL. So it doesn't match Go's bool. Specifications doesn't even mention what's the size it has. It's probably 1 byte but it doesn't say it. You should use int32 instead.
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