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createwindow 定义

HWND WINAPI CreateWindow(
  _In_opt_ LPCTSTR   lpClassName,
  _In_opt_ LPCTSTR   lpWindowName,
  _In_     DWORD     dwStyle,
  _In_     int       x,
  _In_     int       y,
  _In_     int       nWidth,
  _In_     int       nHeight,
  _In_opt_ HWND      hWndParent,
  _In_opt_ HMENU     hMenu,
  _In_opt_ HINSTANCE hInstance,
  _In_opt_ LPVOID    lpParam
);

 修改样式设置style

将窗体设置为 无边框（|WS_POPUP），方便嵌到其他程序里面，一般设置为最大化（WS_MAXIMIZE），如需设置可拖拽（WS_SIZEBOX）。如果需要设置成固定大小及位置 调整xy坐标及width、height 宽高。

CreateWindow((LPCTSTR)"name",
		(LPCTSTR)"title",
		WS_SIZEBOX |WS_POPUP|WS_MAXIMIZE ,
		0,
		0,
		500,
		600,
		0,
		0,
		(HINSTANCE)hWnd,
		NULL);

下面为一些参考链接

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https://msdn.microsoft.com/en-us/library/windows/desktop/ms632679(v=vs.85).aspx

CreateWindow function

Creates an overlapped, pop-up, or child window. It specifies the window class, window title, window style, and (optionally) the initial position and size of the window. The function also specifies the window‘s parent or owner, if any, and the window‘s menu.

To use extended window styles in addition to the styles supported by CreateWindow, use the CreateWindowEx function.

Syntax

HWND WINAPI CreateWindow(
  _In_opt_ LPCTSTR   lpClassName,
  _In_opt_ LPCTSTR   lpWindowName,
  _In_     DWORD     dwStyle,
  _In_     int       x,
  _In_     int       y,
  _In_     int       nWidth,
  _In_     int       nHeight,
  _In_opt_ HWND      hWndParent,
  _In_opt_ HMENU     hMenu,
  _In_opt_ HINSTANCE hInstance,
  _In_opt_ LPVOID    lpParam
);

Parameters

lpClassName [in, optional]

Type: LPCTSTR

A null-terminated string or a class atom created by a previous call to the RegisterClass or RegisterClassEx function. The atom must be in the low-order word of lpClassName; the high-order word must be zero. If lpClassName is a string, it specifies the window class name. The class name can be any name registered with RegisterClass or RegisterClassEx, provided that the module that registers the class is also the module that creates the window. The class name can also be any of the predefined system class names. For a list of system class names, see the Remarks section.

lpWindowName [in, optional]

Type: LPCTSTR

The window name. If the window style specifies a title bar, the window title pointed to by lpWindowName is displayed in the title bar. When using CreateWindow to create controls, such as buttons, check boxes, and static controls, use lpWindowName to specify the text of the control. When creating a static control with the SS_ICON style, use lpWindowName to specify the icon name or identifier. To specify an identifier, use the syntax "#num".

dwStyle [in]

Type: DWORD

The style of the window being created. This parameter can be a combination of the window style values, plus the control styles indicated in the Remarks section.

x [in]

Type: int

The initial horizontal position of the window. For an overlapped or pop-up window, the x parameter is the initial x-coordinate of the window‘s upper-left corner, in screen coordinates. For a child window, x is the x-coordinate of the upper-left corner of the window relative to the upper-left corner of the parent window‘s client area. If this parameter is set to CW_USEDEFAULT, the system selects the default position for the window‘s upper-left corner and ignores the y parameter. CW_USEDEFAULT is valid only for overlapped windows; if it is specified for a pop-up or child window, the x and y parameters are set to zero.

y [in]

Type: int

The initial vertical position of the window. For an overlapped or pop-up window, the y parameter is the initial y-coordinate of the window‘s upper-left corner, in screen coordinates. For a child window, y is the initial y-coordinate of the upper-left corner of the child window relative to the upper-left corner of the parent window‘s client area. For a list box, y is the initial y-coordinate of the upper-left corner of the list box‘s client area relative to the upper-left corner of the parent window‘s client area.

If an overlapped window is created with the WS_VISIBLE style bit set and the x parameter is set to CW_USEDEFAULT, then the y parameter determines how the window is shown. If the y parameter is CW_USEDEFAULT, then the window manager calls ShowWindow with the SW_SHOW flag after the window has been created. If the y parameter is some other value, then the window manager calls ShowWindow with that value as the nCmdShow parameter.

nWidth [in]

Type: int

The width, in device units, of the window. For overlapped windows, nWidth is either the window‘s width, in screen coordinates, or CW_USEDEFAULT. If nWidth is CW_USEDEFAULT, the system selects a default width and height for the window; the default width extends from the initial x-coordinate to the right edge of the screen, and the default height extends from the initial y-coordinate to the top of the icon area. CW_USEDEFAULT is valid only for overlapped windows; if CW_USEDEFAULT is specified for a pop-up or child window, nWidth and nHeight are set to zero.

nHeight [in]

Type: int

The height, in device units, of the window. For overlapped windows, nHeight is the window‘s height, in screen coordinates. If nWidth is set to CW_USEDEFAULT, the system ignores nHeight.

hWndParent [in, optional]

Type: HWND

A handle to the parent or owner window of the window being created. To create a child window or an owned window, supply a valid window handle. This parameter is optional for pop-up windows.

To create a message-only window, supply HWND_MESSAGE or a handle to an existing message-only window.

hMenu [in, optional]

Type: HMENU

A handle to a menu, or specifies a child-window identifier depending on the window style. For an overlapped or pop-up window, hMenu identifies the menu to be used with the window; it can be NULL if the class menu is to be used. For a child window, hMenu specifies the child-window identifier, an integer value used by a dialog box control to notify its parent about events. The application determines the child-window identifier; it must be unique for all child windows with the same parent window.

hInstance [in, optional]

Type: HINSTANCE

A handle to the instance of the module to be associated with the window.

lpParam [in, optional]

Type: LPVOID

A pointer to a value to be passed to the window through the CREATESTRUCT structure (lpCreateParams member) pointed to by the lParam param of the WM_CREATE message. This message is sent to the created window by this function before it returns.

If an application calls CreateWindow to create a MDI client window, lpParam should point to a CLIENTCREATESTRUCT structure. If an MDI client window calls CreateWindow to create an MDI child window, lpParam should point to a MDICREATESTRUCT structure. lpParam may be NULL if no additional data is needed.

Return value

Type:

Type: HWND

If the function succeeds, the return value is a handle to the new window.

If the function fails, the return value is NULL. To get extended error information, call GetLastError.

This function typically fails for one of the following reasons:

• an invalid parameter value
• the system class was registered by a different module
• The WH_CBT hook is installed and returns a failure code
• if one of the controls in the dialog template is not registered, or its window window procedure fails WM_CREATE or WM_NCCREATE

Remarks

Before returning, CreateWindow sends a WM_CREATE message to the window procedure. For overlapped, pop-up, and child windows, CreateWindow sends WM_CREATE, WM_GETMINMAXINFO, and WM_NCCREATE messages to the window. The lParam parameter of the WM_CREATE message contains a pointer to a CREATESTRUCT structure. If the WS_VISIBLE style is specified, CreateWindow sends the window all the messages required to activate and show the window.

If the created window is a child window, its default position is at the bottom of the Z-order. If the created window is a top-level window, its default position is at the top of the Z-order (but beneath all topmost windows unless the created window is itself topmost).

For information on controlling whether the Taskbar displays a button for the created window, see Managing Taskbar Buttons.

For information on removing a window, see the DestroyWindow function.

The following predefined system classes can be specified in the lpClassName parameter. Note the corresponding control styles you can use in the dwStyle parameter.

CreateWindow is implemented as a call to the CreateWindowEx function, as shown below.

#define CreateWindowA(lpClassName, lpWindowName, dwStyle, x, y, nWidth, nHeight, hWndParent, hMenu, hInstance, lpParam)CreateWindowExA(0L, lpClassName, lpWindowName, dwStyle, x, y, nWidth, nHeight, hWndParent, hMenu, hInstance, lpParam)

#define CreateWindowW(lpClassName, lpWindowName, dwStyle, x, y, nWidth, nHeight, hWndParent, hMenu, hInstance, lpParam)CreateWindowExW(0L, lpClassName, lpWindowName, dwStyle, x, y, nWidth, nHeight, hWndParent, hMenu, hInstance, lpParam)

#ifdef UNICODE
#define CreateWindow  CreateWindowW
#else
#define CreateWindow  CreateWindowA
#endif

Examples

For an example, see Using Window Classes.

Requirements

https://msdn.microsoft.com/en-us/library/ms632600(v=vs.85).aspx

Window Styles

The following are the window styles. After the window has been created, these styles cannot be modified, except as noted.

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C:\Program Files (x86)\Windows Kits\10\Include\10.0.15063.0\um\WinUser.h 为各种定义

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from:http://www.cnblogs.com/mqxs/p/3504637.html

CreateWindow

该函数创建一个重叠式窗口、弹出式窗口或子窗口。它指定窗口类，窗口标题，窗口风格，以及窗口的初始位置及大小（可选的）。函数也指该窗口的父窗口或所属窗口（如果存在的话），及窗口的菜单。若要使用除CreateWindow函数支持的风格外的扩展风格，则使用CreateWindowEx函数代替CreateWindow函数。

CreateWindow创建无边框 可拉伸窗体

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原文地址：http://www.cnblogs.com/zhishuai/p/7992018.html