Removing the Title bar of external application using c#

Question

My application starts up another external application.

I want to remove the title bar of this external application once it has started.

Is this feasible, and

Answer 1

If Syncfusion, no. If not, yes.

VB:

Const WS_BORDER As Integer = 8388608
Const WS_DLGFRAME As Integer = 4194304
Const WS_CAPTION As Integer = WS_BORDER Or WS_DLGFRAME
Const WS_SYSMENU As Integer = 524288
Const WS_THICKFRAME As Integer = 262144
Const WS_MINIMIZE As Integer = 536870912
Const WS_MAXIMIZEBOX As Integer = 65536
Const GWL_STYLE As Integer = -16&
Const GWL_EXSTYLE As Integer = -20&
Const WS_EX_DLGMODALFRAME As Integer = &H1L
Const SWP_NOMOVE As Integer = &H2
Const SWP_NOSIZE As Integer = &H1
Const SWP_FRAMECHANGED As Integer = &H20
Const MF_BYPOSITION As UInteger = &H400
Const MF_REMOVE As UInteger = &H1000
Declare Auto Function GetWindowLong Lib "user32.dll" (ByVal hWnd As IntPtr, ByVal nIndex As Integer) As Integer
Declare Auto Function SetWindowLong Lib "user32.dll" (ByVal hWnd As IntPtr, ByVal nIndex As Integer, ByVal dwNewLong As Integer) As Integer
Declare Auto Function SetWindowPos Lib "user32.dll" (ByVal hWnd As IntPtr, ByVal hWndInsertAfter As IntPtr, ByVal X As Integer, ByVal Y As Integer, ByVal cx As Integer, ByVal cy As Integer, ByVal uFlags As Integer) As Boolean
Public Sub MakeExternalWindowBorderless(ByVal MainWindowHandle As IntPtr)
    Dim Style As Integer
    Style = GetWindowLong(MainWindowHandle, GWL_STYLE)
    Style = Style And Not WS_CAPTION
    Style = Style And Not WS_SYSMENU
    Style = Style And Not WS_THICKFRAME
    Style = Style And Not WS_MINIMIZE
    Style = Style And Not WS_MAXIMIZEBOX
    SetWindowLong(MainWindowHandle, GWL_STYLE, Style)
    Style = GetWindowLong(MainWindowHandle, GWL_EXSTYLE)
    SetWindowLong(MainWindowHandle, GWL_EXSTYLE, Style Or WS_EX_DLGMODALFRAME)
    SetWindowPos(MainWindowHandle, New IntPtr(0), 0, 0, 0, 0, SWP_NOMOVE Or SWP_NOSIZE Or SWP_FRAMECHANGED)
End Sub

C#:

const int WS_BORDER = 8388608;
const int WS_DLGFRAME = 4194304;
const int WS_CAPTION = WS_BORDER | WS_DLGFRAME;
const int WS_SYSMENU = 524288;
const int WS_THICKFRAME = 262144;
const int WS_MINIMIZE = 536870912;
const int WS_MAXIMIZEBOX = 65536;
const int GWL_STYLE = -16L;
const int GWL_EXSTYLE = -20L;
const int WS_EX_DLGMODALFRAME = 0x1L;
const int SWP_NOMOVE = 0x2;
const int SWP_NOSIZE = 0x1;
const int SWP_FRAMECHANGED = 0x20;
const uint MF_BYPOSITION = 0x400;
const uint MF_REMOVE = 0x1000;
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true, ExactSpelling = true)]
public static extern int GetWindowLong(IntPtr hWnd, int nIndex);
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true, ExactSpelling = true)]
public static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true, ExactSpelling = true)]
public static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, int uFlags);
public void MakeExternalWindowBorderless(IntPtr MainWindowHandle)
{
    int Style = 0;
    Style = GetWindowLong(MainWindowHandle, GWL_STYLE);
    Style = Style & ~WS_CAPTION;
    Style = Style & ~WS_SYSMENU;
    Style = Style & ~WS_THICKFRAME;
    Style = Style & ~WS_MINIMIZE;
    Style = Style & ~WS_MAXIMIZEBOX;
    SetWindowLong(MainWindowHandle, GWL_STYLE, Style);
    Style = GetWindowLong(MainWindowHandle, GWL_EXSTYLE);
    SetWindowLong(MainWindowHandle, GWL_EXSTYLE, Style | WS_EX_DLGMODALFRAME);
    SetWindowPos(MainWindowHandle, new IntPtr(0), 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_FRAMECHANGED);
}