Messages of button control
[Button control]

Defines

• #define BM_GETCHECK   0xF0F0

  Retrieves the check state of a radio button or check box.
  

• #define BM_SETCHECK   0xF0F1

  Sets the check state of a radio button or check box.
  

• #define BM_GETSTATE   0xF0F2

  Gets the state of a button or check box.
  

• #define BM_SETSTATE   0xF0F3

  Sets the state of a button.
  

• #define BM_SETSTYLE   0xF0F4

  Changes the style of a button.
  

• #define BM_CLICK   0xF0F5

  Simulates the user clicking a button.
  

• #define BM_GETIMAGE   0xF0F6

  Retrieves the handle to the image.
  

• #define BM_SETIMAGE   0xF0F7

  Associates a new image (icon or bitmap) with the button.
  

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Define Documentation

#define BM_CLICK   0xF0F5

Simulates the user clicking a button. An application sends a BM_CLICK message to simulate the user clicking a button. BM_CLICK wParam = 0; lParam = 0; Definition at line 483 of file button.h.

#define BM_GETCHECK   0xF0F0

Retrieves the check state of a radio button or check box. An application sends a BM_GETCHECK message to retrieve the check state of a radio button or check box. BM_GETCHECK wParam = 0; lParam = 0; Returns: An integer indicates whether the button is checked. Return values: BST_UNCHECKED  The button is not checked. BST_CHECKED  The button is checked. BST_INDETERMINATE  The button is grayed because the state of the button is indeterminate. See also: States of button control Definition at line 376 of file button.h.

#define BM_GETIMAGE   0xF0F6

Retrieves the handle to the image. An application sends a BM_GETIMAGE message to retrieve a handle to the image (icon or bitmap) associated with the button. BM_GETIMAGE int image_type; wParam = (WPARAM)&image_type; lParam = 0; Parameters: image_type  The type of a button image will be returned through this buferr. It can be one of the following values: BM_IMAGE_BITMAP Bitmap of a button. BM_IMAGE_ICON Icon of a button. Returns: A handle of the bitmap or icon of the button, zero when error. Definition at line 509 of file button.h.

#define BM_GETSTATE   0xF0F2

Gets the state of a button or check box. An application sends a BM_GETSTATE message to determine the state of a button or check box. BM_GETSTATE wParam = 0; lParam = 0; Returns: An integer indicates the button state. See also: States of button control Definition at line 421 of file button.h.

#define BM_SETCHECK   0xF0F1

Sets the check state of a radio button or check box. An application sends a BM_SETCHECK message to set the check state of a radio button or check box. BM_SETCHECK int check_state; wParam = (WPARAM)check_state; lParam = 0; Parameters: check_state  The check state of button, can be one of the following values: BST_UNCHECKED Want the button to be unchecked. BST_CHECKED Want the button to be checked. BST_INDETERMINATE Want the button to be grayed if it is a three states button. Returns: The old button state. Definition at line 402 of file button.h.

#define BM_SETIMAGE   0xF0F7

Associates a new image (icon or bitmap) with the button. An application sends a BM_SETIMAGE message to associate a new image (icon or bitmap) with the button. Please use BM_IMAGE_BITMAP or BM_IMAGE_ICON as the first parameter of the message to indicate the type of button control image: BM_IMAGE_BITMAP Specifies the type of image to associate with the button to be a bitmap. BM_IMAGE_ICON Specifies the type of image to associate with the button to be an icon. Definition at line 528 of file button.h.

#define BM_SETSTATE   0xF0F3

Sets the state of a button. An application sends a BM_SETSTATE message to set the state of a button. BM_SETSTATE int push_state; wParam = (WPARAM)push_state; lParam = 0; Parameters: push_state  The push state of a button, can be one of the following values: Zero Want the button to be unpushed. Non zero Want the button to be pushed. Returns: The old button state. Definition at line 446 of file button.h.

#define BM_SETSTYLE   0xF0F4

Changes the style of a button. An application sends a BM_SETSTYLE message to change the style of a button. BM_SETSTYLE int button_style; wParam = (WPARAM)button_style; lParam = 0; Parameters: button_style  The styles of a button. Returns: Always be zero. See also: Styles of button control Definition at line 468 of file button.h.

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