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This article will explain in detail how to define the use of fillrect. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

The FillRect function fills the rectangle with the specified brush, which includes the upper-left boundary of the rectangle, but not the lower-right boundary of the rectangle.

FillRect function prototype

IntFillRect (HDChdc,CONSTRECT*lprc,HBRUSHhbr)

Parameters.

Hdc: device environment handle.

Lprc: a pointer to the RECT structure that contains the logical coordinates of the rectangle to be filled.

Hbr: a handle to a brush that fills a rectangle.

Return value

If the function call succeeds, the return value is non-zero; if the function call fails, the return value is 0.

WindowsNT: for more error messages, call the GetLastError function.

Remarks

The brush defined by the parameter hbr can be either a logical brush handle or a color value. If you specify a logical brush handle, call one of the following functions to get the handle; CreateHatchBrush, CreatePatternBrush, or CreateSolidBrush. In addition, you can use GetStockObject to get a stock brush handle. If you specify a color value, it must be a standard system color (the selected color must be added by 1) such as FillRect (hdc,&rect, (HBRUSH) (COLOR_ENDCOLORS+1)). See GetSysColor for a list of all standard system colors.

When filling a specified rectangle, FillRect does not include the right and lower boundaries of the rectangle. Regardless of the current mapping mode, GDI fills a rectangle that does not include the columns on the right and the rows below.

WindowsCE: in the WindowsCE1.0 version, the parameter hbr cannot be a color brush. In the WindowsCE2.0 version, this function is the same as on the Windows desktop platform.

Quick check: WindowsNT:3.1 and above; Windows:95 and above; WindowsCE:1.0 and above; header file: wingdi.h; library file: gdi32.lib.

The use of FillRect in VC++

/ / get the equipment environment variables in the customer area

CDC*pDC=CDC::FromHandle (lpDrawItemStruct- > hDC)

GetClientRect (& m_ClientRect); / / get the customer area rectangle

If (m_Btntype==0) / / determines whether the current button type is an advanced color button

{

Switch (m_State)

{

Case0:

PDC- > FillRect (& masked ClientRectMagneNewCBrush (RGB (255255255)

Break

Case1:

PDC- > FillRect (& masked ClientRectMagneNewCBrush (RGB (192192255)

}

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