How display a bitmap transparencly in a From(50分)

X

xgd

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GUEST, unregistred user!

• 2000-09-13

• #1

Don't use the Image Control,drectly draw a bitmap in the
form transparenly(as a background image),for example,put a
RichMemo Control in the Form,I can see the bitmap back the
RichMemo control.I hear of having a Win32 API Which can do
this,please Help me! Thank You!

 

X

xgd

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GUEST, unregistred user!

• 2000-09-13

• #2

请教各位

 

P

pino

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GUEST, unregistred user!

• 2000-09-14

• #3

AlphaBlend(
hdcDest: HDC; nXOriginDest, nYOriginDest, nWidthDest, hHeightDest: Integer;
hdcSrc: HDC; nXOriginSrc, nYOriginSrc, nWidthSrc, nHeightSrc:: Integer;
blendFunction: TBlendFunction
);
参数含义请查阅 WIN32 API 帮助

 

A

Another_eYes

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GUEST, unregistred user!

• 2000-09-14

• #4

最简单的: Form.Canvas.BrushCopy

稍微复杂点的:
function TransparentStretchBlt(DstDC: HDC; DstX, DstY, DstW, DstH: Integer;
SrcDC: HDC; SrcX, SrcY, SrcW, SrcH: Integer; MaskDC: HDC; MaskX,
MaskY: Integer): Boolean;

(BTW: TCanvas.BrushCopy就是通过调用TransparentStretchBlt实现的).

 

A

Another_eYes

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GUEST, unregistred user!

• 2000-09-24

• #5

多人接受答案了。

 

X

xgd

Unregistered / Unconfirmed

GUEST, unregistred user!

• 2000-10-08

• #6

Thank you!