How do I get the header height of a Listview

Question

Can somebody tell me how to get the header height of a ListView.

Answer 1

@Phaedrus

..long long time ago.. but: PInvokeStackImbalance is called

The signature of SendMessage is (long != Uint32):

LRESULT WINAPI SendMessage(
    _In_  HWND hWnd,
    _In_  UINT Msg,
    _In_  WPARAM wParam,
    _In_  LPARAM lParam
)

Change all to:

const UInt32 LVM_FIRST = 0x1000;
const UInt32 LVM_GETHEADER = (LVM_FIRST + 31);

[Serializable, System.Runtime.InteropServices.StructLayout(System.Runtime.InteropServices.LayoutKind.Sequential)]
public struct RECT
{
    public int Left;
    public int Top;
    public int Right;
    public int Bottom;
}

[System.Runtime.InteropServices.DllImport("user32.dll", CharSet = System.Runtime.InteropServices.CharSet.Auto)]
    static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam);
[System.Runtime.InteropServices.DllImport("user32.dll")]
private static extern bool GetWindowRect(System.Runtime.InteropServices.HandleRef hwnd, out RECT lpRect);

int youtFuncToGetHeaderHeight()
{
    RECT rc = new RECT();
    IntPtr hwnd = SendMessage((IntPtr)this.Handle, LVM_GETHEADER, IntPtr.Zero, IntPtr.Zero);
    if (hwnd != null)
    {
        if (GetWindowRect(new System.Runtime.InteropServices.HandleRef(null, hwnd), out rc))
        {
            int headerHeight = rc.Bottom - rc.Top;
        }
    }
    return -1;
}