如何将此 VB.NET 代码翻译成 C#？

Question

我正在尝试将此 VB.NET 代码转换为 C#，但我是 C# 新手。

这是我的代码 VB.NET 代码：

 Declare Function SetWindowPos Lib "user32" Alias "SetWindowPos" ( _
        ByVal hwnd As Integer, _
        ByVal hWndInsertAfter As Integer, ByVal x As Integer, ByVal y As Integer, _
        ByVal cx As Integer, ByVal cy As Integer, ByVal wFlags As Integer) As Integer

 Private Const SWP_NOSIZE As Integer = &H1
 Private Const SWP_NOMOVE As Integer = &H2

 Private Shared ReadOnly HWND_TOPMOST As New IntPtr(-1)
 Private Shared ReadOnly HWND_NOTOPMOST As New IntPtr(-2)
 Private windows As New WindowInteropHelper(Me)

 Public Function MakeTopMost()
     SetWindowPos(windows.Handle, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE Or SWP_NOSIZE)
 End Function

这是我的 C# 代码：

 [DllImport("user32.dll", EntryPoint = "SetWindowPos")]
 public static extern IntPtr SetWindowPos(string hWnd, int hWndInsertAfter, int x, int Y, int cx, int cy, int wFlags);

 private const int SWP_NOSIZE = 0x1;
 private const int SWP_NOMOVE = 0x2;


 public void MakeTopMost()
 {
     SetWindowPos(windows.Handle, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE);
 }

MakeTopMost() 中的错误：参数无效

Answer 1

    [DllImport("user32.dll", EntryPoint = "SetWindowPos")]
    public static extern IntPtr SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int x, int Y, int cx, int cy, int wFlags);

    private const int SWP_NOSIZE = 0x1;
    private const int SWP_NOMOVE = 0x2;
    private static readonly IntPtr HWND_TOPMOST = new IntPtr(-1);
    private static readonly IntPtr HWND_NOTOPMOST = new IntPtr(-2);
    private WindowInteropHelper windows = new WindowInteropHelper(this);

    public void MakeTopMost()
    {
        SetWindowPos(windows.Handle, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE);
    }

它不应该出现任何错误。

Answer 2

十六进制数字以0x开头：

private const int SWP_NOSIZE = 0x1;
private const int SWP_NOMOVE = 0x2;

Answer 3

对于MakeTopMost() 函数，您需要使用单个 |不是两个，因为两个转换为“OrAlso”，只能在条件中使用。这是完整的代码（从评论线程中反映出来）

[DllImport("user32.dll", EntryPoint = "SetWindowPos")]
private const int SWP_NOSIZE = 0x1;
private const int SWP_NOMOVE = 0x2;
private readonly IntPtr HWND_TOPMOST = new IntPtr(-1);
private readonly IntPtr HWND_NOTOPMOST = new IntPtr(-2);
private WindowInteropHelper windows = new WindowInteropHelper(this); 

public static extern IntPtr SetWindowPos(string hWnd, IntPtr hWndInsertAfter, int x, int Y, int cx, int cy, int wFlags);

public void MakeTopMost()
{
    SetWindowPos(windows.handle, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE);
}