private void CreateTool()
{
System.Diagnostics.Debug.Assert(
mToolP.Handle != IntPtr.Zero,
"parent hwnd is null", "SetToolTip");
CreateParams cp = new CreateParams();
cp.ClassName = TOOLTIPS_CLASS;
cp.Style =
WS_POPUP |
TTS_BALLOON |
TTS_NOPREFIX |
TTS_ALWAYSTIP |
TTS_CLOSE;
mTool.CreateHandle(cp);
ti = new TOOLINFO();
ti.cbSize = Marshal.SizeOf(ti);
ti.uFlags = TTF_TRACK |
TTF_IDISHWND |
TTF_TRANSPARENT |
TTF_SUBCLASS |
TTF_PARSELINKS;
if (tipmPos)
{
ti.uFlags |= TTF_ABSOLUTE;
}
if (tipmCen)
{
ti.uFlags |= TTF_CENTERTIP;
}
ti.uId = mTool.Handle;
ti.lpszText = tipmText;
ti.hwnd = mToolP.Handle;
GetClientRect(mToolP.Handle, ref ti.rect);
ClientToScreen(mToolP.Handle, ref ti.rect);
SetWindowPos(
mTool.Handle,
HWND_TOPMOST,
0, 0, 0, 0,
SWP_NOACTIVATE |
SWP_NOMOVE |
SWP_NOSIZE);
IntPtr ptrStruct = Marshal.AllocHGlobal(Marshal.SizeOf(ti));
Marshal.StructureToPtr(ti, ptrStruct, true);
SendMessage(
mTool.Handle, TTM_ADDTOOL, 0, ptrStruct);
ti = (TOOLINFO)Marshal.PtrToStructure(ptrStruct,
typeof(TOOLINFO));
SendMessage(
mTool.Handle, TTM_SETMAXTIPWIDTH,
0, new IntPtr(mtoolMax));
IntPtr ptrTitle = Marshal.StringToHGlobalAuto(tipmTitle);
SendMessage(
mTool.Handle, TTM_SETTITLE,
(int)tipmTI, ptrTitle);
SetPos(ti.rect);
Marshal.FreeHGlobal(ptrStruct);
Marshal.FreeHGlobal(ptrTitle);
}
