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WindowFromPoint() or possibly ChildWindowFromPoint()
Sonork 100.11743 Chicken Little
"You're obviously a superstar." - Christian Graus about me - 12 Feb '03
Within you lies the power for good - Use it!
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You might want search MSDN there is an old sample program on using DIBs. What the program does is allow you to move the cursor over a window a capture it to a DIB. If you search for a screen/windows capture program here or on the web you should be able to find additional examples.
Trust in the code Luke. Yea right!
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Why does the colour black get displayed transparently in a CListCtrl given an associated imagelist.
How do I preserve the black colour .. ?
Thanks in advance.
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Depending upon how you create the image list, the color black can be used as a mask value. Pixels in the bitmaps that are the mask color are displayed as transparent.
The easiest way to handle transparency with an image list is to use icons, rather than ordinary bitmaps.
Software Zen: delete this;
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Thanks Gary for the reply.
So, how do I specify a different mask colour other than black so that the black can be preserved.
The imagelist that I am using works just fine with the rest of the application and yes it is constructed from a bitmap.
Thanks.
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What I do is color the "Transparent" part of the bitmap to a purple/pinkish color and set the mask to that color.. like this..
CImageList imageList;
CBitmap bitmap;
bitmap.LoadBitmap(IDB_TOOLBAR);
imageList.Create(26, 26, ILC_COLORDDB|ILC_MASK, 0, 0);
imageList.Add(&bitmap, RGB(255,0,255)); // PURPLE COLOR
Rob..
Whoever said nothing's impossible never tried slamming a revolving door!
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Thanks for the reply.
Thanks for the suggestion, but my problem does not involve transparent areas of the source bitmap but the default drawing of any black pixels transparently.
I already have an Imagelist defined for use in the application and I use a temporary DC to draw to prior to using the TransparentBlt function for transparent rendering.
My question is how do I honour the black pixels in the bitmaps when providing an ImageList for a CListCtrl using the .SetImageList function. When the images are displayed in the list, the black pixels are rendered transparently.
How do I prevent or circumvent this ?
Thanks in advance.
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If you choose another color as the mask color (purple = RGB(255,0,255) in the example earlier in the thread), then that color is treated as transparent, and black is just another color in the bitmap. This is the standard behavior regarding the list control and imagelists.
You mentioned using TransparentBlt. From the MSDN:
BOOL TransparentBlt(
HDC hdcDest,
int nXOriginDest,
int nYOriginDest,
int nWidthDest,
int hHeightDest,
HDC hdcSrc,
int nXOriginSrc,
int nYOriginSrc,
int nWidthSrc,
int nHeightSrc,
UINT crTransparent
);
<listing>Parameters
...
crTransparent
[in] The RGB color in the source bitmap to treat as transparent.</listing>
In this case, you would need to pass cdTransparent as whatever color you were using as the transparency color (again, RGB(255,0,255) from the example).
Software Zen: delete this;
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Thats great, now I understand.
Thanks very much for the help.
Cheers.
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I am try to open a table using Open() method of CRecordset
If I gave * in Query then it running well.But if I gave a perticuler Column Name then Open() method giving Error
'Invalid Descriptor Index'
Is there some one who can help me ?
N'Joy
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Please give the exact code
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Using winpcap
I want the Filter string for "pcap_compile" function that can capture all the traffic passing through the network when applied to the filter funtion "pcap_setfilter".
Please refer any material or helping document that shows which strings are allowed and which are not like I am trying "tcp and udp" but this string fails. 
Reply me soon
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Hello, I have two little questions :
in my progr I use ShellExecute to open an internet link, and each time I call ShellExecute the page is opened in the same IE window.. how to open a new window ?
And the second (stupid!) one, how to add a ActiveX control on a dialog in VS .NET (like an IE control...) ? I didn't find the option like in VC++ 6..
Tkanks!
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Interesting. Consider CreateProcess().
Kuphryn
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tinkywinky wrote:
in my progr I use ShellExecute to open an internet link, and each time I call ShellExecute the page is opened in the same IE window.. how to open a new window ?
That's actually an options in IE where people can select if pages should recycle windows or open in a new one...
Tools->Internet Options->Advanced
Under browsing there's a checkbox called "Reuse Windows for Launching Shortcuts". If you wanna force it try createprocess as already sugested...
- Anders
Money talks, but all mine ever says is "Goodbye!"
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Use the opennew verb instead of open.
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COol, thanks 
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Hi!
I have a dialog and I create button [myButton->Create(...)].
1. When I use OnLButtonDown in my dialog, it doesn't react when myButton is clicked. I want to know when my dynamic button is clicked.
2. How to recive messages from this dynamic button?
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>I have a dialog and I create button [myButton->Create(...)].
>1. When I use OnLButtonDown in my dialog, it doesn't react when myButton
>is clicked. I want to know when my dynamic button is clicked.
Why should it, after all you clicked on button, not the dialog.
>How to recive messages from this dynamic button?
There are number of ways you can get notified when user clicked on child control....
When you creating myButton you are passing handle for the parent CMyDialog....
1) Add public member CMyDialog::ButtonPressed(CString& strName), override inside CmyButtonClass::OnLButtonDown to do something like
{
CMyDialog *pDlg = (CMyDialog *) GetParent();
pDlg->ButtonPressed(CString("myButton");
}
2) You can define own custom message and send it to parent...
3)....
Brian
In CmyButton::OnLButtonDown() you could GetParent()
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Override OnNotify and check for BN_CLICKED notification from your button's ID.
Regards,
BB
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Friends,
I want to subclass an edit control present on my dialog template. For this purpose i derived my on class CMyDialog form base CEdit, and assign the instance of edit control to my class instead of CEdit class. Every thing works fine till here and program runs successfully. Then i needed to handle the WM_PAINT message of my edit control, so i override OnPaint in CMyDialog class. Till here everything works fine.
Now the problem is that i want to handle WM_CREATE message of edit control also. For this purpose i am overriding OnCreate(), but the trouble is that the program is not calling my overridden OnCreate method. Any idea ???
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WM_CREATE is sent to the edit control befeore you get a chance to subclass it, so you have to override PreSubclassWindow() instead.
Sonork 100.11743 Chicken Little
"You're obviously a superstar." - Christian Graus about me - 12 Feb '03
Within you lies the power for good - Use it!
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I have many errors when I compiled it. I think it's all from overloading operator. I have so many errors...this is one of them
binary '+' : no operator defined which takes a right-hand operand of type 'class FuelPurchase' (or there is no acceptable conversion. Can anyone fix please this for me?
Here's my coding
Header file of vehicle
<br />
#ifndef VEHICLE_H<br />
#define VEHICLE_H<br />
using namespace std;<br />
<br />
static const int LEN = 25;<br />
<br />
class Vehicle<br />
{ <br />
private:<br />
char name[LEN]; <br />
char model[LEN]; <br />
int year;<br />
int totalcost;<br />
int totallitres; <br />
<br />
public:<br />
Vehicle();<br />
Vehicle(const char *n, char *m, int y);<br />
Vehicle(const Vehicle &r);
Vehicle operator +(const Journey& m) const;<br />
Vehicle operator +(const FuelPurchase& f) const; <br />
print(); <br />
<br />
<br />
};<br />
#endif<br />
source file of Vehicle
<br />
#include <iostream.h><br />
#include <iomanip.h><br />
#include <string.h><br />
#include "vehicle.h"<br />
<br />
using namespace std;<br />
<br />
Vehicle::Vehicle()<br />
{<br />
strcpy(name, "");<br />
strcpy(model, "");<br />
year = 0;<br />
}<br />
<br />
Vehicle::Vehicle(char *n, char *m, int y) <br />
{<br />
strncpy(name, n, LEN);<br />
strncpy(model, m, LEN);<br />
year = y;<br />
}<br />
<br />
Vehicle::Vehicle(const Vehicle &r)
{<br />
name = r.name;<br />
model = r.model;<br />
year = r.year;<br />
totalcost = r.totalcost;<br />
totallitres = r.totallitres;<br />
<br />
}<br />
<br />
Vehicle:perator +(const Journey& m);
{<br />
Vehicle v;<br />
v.totaldistance = totaldistance + m.distance;<br />
return (*this);<br />
<br />
} <br />
<br />
Vehicle:perator +(const FuelPurchase& f);
{ <br />
Vehicle v;<br />
v.totalcost = totalcost + f.cost; <br />
v.totallitres = totallitres + f.litres; <br />
return (*this);<br />
<br />
}<br />
<br />
<br />
Vehicle:Print() <br />
{ int distance=0,services=0,cost=0,litres=0;
double fueleconomy=0, average=0;
cout.setf(ios::fixed);<br />
cout.setf(ios::showpoint);<br />
cout.precision(1);<br />
<br />
cout <<"Vehicle: "<<endl;
cout <<distance<<"km travelled requiring "<<litres<<" litres of fuel at a cost of$"<<cost<<endl;
if (distance==0)<br />
{ <br />
cout <<"No travel has been recorded yet"<<endl;<br />
cout <<"No fuel has been purchased yet"<<endl;<br />
}<br />
<br />
else<br />
{ <br />
int fueleconomy = (litres/distance)*100;
cout << "This vehicle achieved a fuel economy of "<<fueleconomy<<"litres/100km"<<endl;<br />
int services = distance/100;<br />
cout << "This vehicle should have undergone "<<services<<" service(s)"<<endl;
average = cost/litres;<br />
cout << "The average cost of fuel was $ "<<average<<endl;<br />
}<br />
return(0);<br />
}<br />
this si header file for journey
<br />
#ifndef JOURNEY_H<br />
#define JOURNEY_H<br />
<br />
class Journey<br />
{<br />
private:<br />
int distance;<br />
<br />
public:<br />
Journey();<br />
Journey(const int distance);<br />
<br />
};<br />
#endif<br />
this is source file file journey
<br />
#include <iostream><br />
#include "journey.h"<br />
using namespace std;<br />
<br />
Journey::Journey()<br />
{<br />
distance = 0;<br />
}<br />
<br />
Journey::Journey(int distance)<br />
{<br />
distance = d;<br />
}<br />
here's the header file for FuelPurchase
<br />
#ifndef FUELPURCHASE_H<br />
#define FUELPURCHASE_H<br />
<br />
class FuelPurchase<br />
{<br />
private:<br />
int cost;<br />
int litres;<br />
<br />
public:<br />
FuelPurchase();<br />
FuelPurchase(const int c, int l);<br />
<br />
};<br />
#endif<br />
This is source file for FuelPurchase
<br />
#include <iostream.h><br />
#include "fuelpurchase.h"<br />
using namespace std;<br />
<br />
FuelPurchase::FuelPurchase()<br />
{<br />
cost = 0;<br />
litres = 0;<br />
<br />
}<br />
<br />
FuelPurchase::FuelPurchase(int c, int l)<br />
{<br />
<br />
cost = c;<br />
litres = l;<br />
}<br />
Here's the main code...
<br />
#include <iostream><br />
#include <string><br />
<br />
using namespace std;<br />
<br />
#include "Vehicle.h"<br />
#include "FuelPurchase.h"<br />
#include "Journey.h"<br />
<br />
int main(int argc, char* argv[])<br />
{<br />
Vehicle a("BMW", "A6", 2003);<br />
Vehicle b("Toyota", "A100", 2003);<br />
Vehicle c("Mercedes-Benz", "CL600", 2003);<br />
<br />
cout << "Original Statistical:" << endl;<br />
cout << "=====================" << endl;<br />
<br />
a.print();<br />
b.print();<br />
c.print();<br />
<br />
a = a + FuelPurchase(50, 60);<br />
a = a + Journey(150);<br />
a = a + FuelPurchase(12, 15);<br />
<br />
b = b + FuelPurchase(50, 60);<br />
b = b + Journey(250);<br />
b = b + FuelPurchase(22, 22);<br />
<br />
c = c + FuelPurchase(50, 60);<br />
c = c + Journey(350);<br />
c = c + FuelPurchase(50, 40);<br />
<br />
cout << "Final Statistics:" << endl;<br />
cout << "=================" << endl;<br />
<br />
a.print();<br />
b.print();<br />
c.print();<br />
<br />
return(0);<br />
}<br />
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Tozilla wrote:
I have many errors when I compiled it.
You're right, you have many errors. Among them are many typos, mismatched parameters, undeclared variables, misplaced semicolons, etc.
Trying to overload the '+' operator is the least of your problems.
Please cleanup all the other simple errors first, and then repost your code, and then maybe someone can help you with the operator override part.
Sonork 100.11743 Chicken Little
"You're obviously a superstar." - Christian Graus about me - 12 Feb '03
Within you lies the power for good - Use it!
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