Vcl.Controls.TCreateParams

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• Fields

Delphi

  TCreateParams = record
    Caption: PChar;
    Style: DWORD;
    ExStyle: DWORD;
    X, Y: Integer;
    Width, Height: Integer;
    WndParent: HWnd;
    Param: Pointer;
    WindowClass: TWndClass;
    WinClassName: array[0..63] of Char;
  end;

C++

struct DECLSPEC_DRECORD TCreateParams
{
public:
    System::WideChar *Caption;
    unsigned Style;
    unsigned ExStyle;
    int X;
    int Y;
    int Width;
    int Height;
    HWND WndParent;
    void *Param;
    tagWNDCLASSW WindowClass;
    System::StaticArray<System::WideChar, 64> WinClassName;
};

Properties

Type	Visibility	Source	Unit	Parent
record struct	public	Vcl.Controls.pas Vcl.Controls.hpp	Vcl.Controls	Vcl.Controls

Description

TCreateParams is the window-creation parameter record used to specify the type of window to create for a windowed control.

TCreateParams is a data structure for holding information needed when telling Windows to create a window. The fields of a TCreateParams record become the parameters to a call to the CreateWindowEx API function.

TCreateParams contains the following fields:

Field	Meaning
Caption	The window caption. This is usually the value of the Caption or Text property of the control.
Style	The Windows style for the window. This is a bit array of flags such as WS_CHILD or WS_DISABLED. See the Microsoft Windows documentation for possible flags.
ExStyle	The extended Windows style for the window. This is one of the Windows predefined extended style constants such as WS_EX_TOOLWINDOW or WS_EX_CONTROLPARENT. See the Microsoft Windows documentation for possible values: Window Styles
X	The x coordinate of the left side of the window. This is usually the same as the Left property.
Y	The y coordinate of the top of the window. This is usually the same as the Top property.
Width	The width, in pixels, of the window. This is usually the same as the Width property.
Height	The height, in pixels, of the window. This is usually the same as the Height property.
WndParent	The window handle of the parent window. This is the same as the Handle property of the parent control.
Param	A pointer to the windows creation parameter that is passed as the LParam of the WM_CREATE message.
WindowClass	The WindowClass record that describes the class of window being created. The WindowClass record includes information about the window procedure, style, default cursor, background brush, associated menus, and so on.
WinClassName	The window class name. This must be the name of a window class that has already been registered. Windows provides several built-in window classes with predefined names. Applications may also register their own custom window classes.

See Also

• TWinControl
• CreateWindowEx
• Window Styles