没有MSDN，谁能告诉我WM_CTRLCOLOR的wParam,lParam的意义和返回值？

[wangjs720]

没有MSDN，谁能告诉我WM_CTRLCOLOR的wParam,lParam的意义和返回值？

[vcmute]

HDC
HWND

[dirdirdir3]

(HDC) wParam;
(HWND) lParam;

[threenewbee]

WM_CTLCOLORSTATIC Notification

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A static control, or an edit control that is read-only or disabled, sends the WM_CTLCOLORSTATIC message to its parent window when the control is about to be drawn. By responding to this message, the parent window can use the specified device context handle to set the text and background colors of the static control.

A window receives this message through its WindowProc function.


Syntax

WM_CTLCOLORSTATIC

WPARAM wParam
LPARAM lParam;

Parameters

wParam
Handle to the device context for the static control window.
lParam
Handle to the static control.
Return Value

If an application processes this message, the return value is a handle to a brush that the system uses to paint the background of the static control.

Remarks

By default, the DefWindowProc function selects the default system colors for the static control.

Edit controls that are not read-only or disabled do not send the WM_CTLCOLORSTATIC message; instead, they send the WM_CTLCOLOREDIT message.

The system does not automatically destroy the returned brush. It is the application's responsibility to destroy the brush when it is no longer needed.

The WM_CTLCOLORSTATIC message is never sent between threads; it is sent only within the same thread.

If a dialog box procedure handles this message, it should cast the desired return value to a BOOL and return the value directly. If the dialog box procedure returns FALSE, then default message handling is performed. The DWL_MSGRESULT value set by the SetWindowLong function is ignored.

Notification Requirements

Minimum DLL Version None
Header Declared in Winuser.h, include Windows.h
Minimum operating systems Windows 95, Windows NT 3.1