sendmessage怎么取颜色?(10分)

A

Argus

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• 2003-11-23

• #1

sendmessage(handle,???);<br>求助sendmessage怎么取某点的颜色??

 

P

pukerno3

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• 2003-11-23

• #2

不懂。颜色？or 参数？

 

A

Argus

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• 2003-11-23

• #3

to：pukerno3<br>就是怎么设置参数后取得某个窗口上的某个点的颜色。<br>

 

P

pukerno3

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• 2003-11-23

• #4

颜色要用另外的方法取的。如下；<br>procedure Tgetcol.FormClick(Sender: TObject);<br>var t : tcolor;<br>r,g,b : byte;<br>begin<br>&nbsp; t := canvas.pixels[tx,ty];<br>&nbsp; r := getRvalue(t);<br>&nbsp; g := getGvalue(t);<br>&nbsp; B := getBvalue(t);<br>end;<br>剩下的就是把这三个参数传出去。

 

A

Argus

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• 2003-11-23

• #5

to：pukerno3<br>我要去的颜色的窗口只有handle.<br>无法用这种方法。我想用sendmessage只取某点颜色加以判断就行了

 

A

Argus

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• 2003-11-24

• #6

我要取的颜色的窗口只有handle.<br>无法用这种方法。我想用sendmessage只取某点颜色加以判断就行了 &nbsp;

 

R

Rudder

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• 2003-11-24

• #7

有够难，查了N多资料也找不到！<br>

 

R

realLearning

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• 2003-11-24

• #8

直接发消息好像没有这么个参数，不过有handle还怕什么。<br>var<br>&nbsp; DC : HDC;<br>&nbsp; Color : Integer;<br>begin<br>&nbsp; DC := GetDC(Handle);<br>&nbsp; try<br>&nbsp; &nbsp; Color := GetPixel(DC,X,Y);<br>&nbsp; &nbsp; Panel1.Color := Color;<br>&nbsp; finally<br>&nbsp; &nbsp; ReleaseDC(Handle,DC);<br>&nbsp; end;