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See Rechard....I have a mfc application which I already converted to a shared dll. This dll has a mainwindow. Now from a client program I want to launch that mainwindow of the dll and work on the application. This is very simple approach and I am sure its feasible in mfc only thing I dont know how. So I am trying get your help. Please help me if you can. Check my last post.
I have a shared mfc dll where I have one extern "C" function exported as runAppli there I am only triying to display the mainwindnow. And another mfc client exe from where I am loading the dll and trying to call the runAppli to launch the mainwindow. I dont understand why it seems to be impossible. This is a very simple problem. Please help me if you can. Thanks a lot for your reply. Sujan
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sujandasmahapatra wrote: I have a mfc application which I already converted to a shared dll.
WHY? This is really not a sensible option as you have discovered to your cost. Go back to the original and run the application as an application; trying to make it into a DLL is a pointless exercise and is unlikely ever to work.
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Dear Richar tag option is not coming . So excuse me this time, next post onwards I'll put tags properly
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Now my code looks like this. My application launching but crashing.
[pre]
void CClientRevProjDlg::OnBnClickedButton1()
{
typedef VOID (*MYPROC)(HWND);
HINSTANCE hinstLib;
MYPROC ProcAdd;
BOOL fFreeResult, fRunTimeLinkSuccess = FALSE;
HWND h = AfxGetMainWnd()->GetSafeHwnd();
// Get a handle to the DLL module.
hinstLib = LoadLibrary(L"C:\\Users\\DasmahapatraS\\Projects\\Bhagavan_Cadem\\RevolutionProj\\debug\\RevolutionProj.dll");
// If the handle is valid, try to get the function address.
if (hinstLib != NULL)
{
ProcAdd = (MYPROC) GetProcAddress(hinstLib, "runAppli");
// Do add operation
// If the function address is valid, call the function.
if (fRunTimeLinkSuccess = (ProcAdd != NULL))
(ProcAdd) (h);
// Free the DLL module.
fFreeResult = FreeLibrary(hinstLib);
}
// If unable to call the DLL function, use an alternative.
if (! fRunTimeLinkSuccess)
printf("message via alternative method\n");
}
[/pre]
/////////////////////////////////////////////////////////////////////////////////////
And runAppli like this...
[code]
extern "C" BOOL __declspec(dllexport) runAppli(HWND h)
{
AFX_MANAGE_STATE(AfxGetStaticModuleState());
ShowWindow(h,SW_SHOW);
return true;
}
[/code]
modified 23-Oct-11 12:49pm.
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1. You still have not properly used <pre> tags around your code as requested.
2. You are really wasting your time with this; as I said before forget using this DLL as it serves no purpose. Create an application as an application and do things the right way.
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 I need this dll to work Richard. Its very important......My application should be served as a dll. And my mainwindow should appear.
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Why do you persist with this? This is totally contrary to the design of Windows applications. Putting all this code into a DLL is just going to cause you problems and, as I have said repeatedly, serves absolutely no purpose. Perhpas if you actually explained what problem you are trying to resolve someone can advise you of a potential solution, but just insisting that you need this as a DLL makes no sense.
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Problem I have explained earlier also. I have built one application in mfc...Now I want to launch that application from another aplication. so I want to make the first application as dll and try to laucnh that application from my 2nd application. Howelse would that be achieved except dll. ??? you tell me. Thanks Sujan
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sujandasmahapatra wrote: Howelse would that be achieved except dll.
This has nothing to do with DLLs; I can only repeat: this is not the way to do it, DLLs are shared libraries not stand alone applications. If you want to launch a second application from a first then use one of the proper API functions[^].
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window handle is creaeing all the problem check this I am trying to get the handle like this
[code]
HWND h = this->m_hWnd;
[/code]
from the dialog class.....This is giving problem.....PLease tell me how can I get the window handle from dialog class. HWND handle. If I get the correct handle then it'll launch the application. Thanks Sujan
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Sorry, but I don't understand what you are saying. The last few messages you were trying to launch an MFC application held inside a DLL, and now you seem to be doing something else that does not make sense. Where does this dialog fit in to what you have been talking about? And you still have not figured out how to add <pre> tags around your code!
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HWND is a public member of CDialog -- you can access it just like any other member of CDialog class.
HWND CMyDialog::GetHandle()
{
return m_hWnd;
}
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Yet_another_Coder_Dude wrote: HWND is a public member of CDialog
No, HWND is a type defined in Windows.h.
Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman
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when I try to access the m_hWnd from my dialog it says "unused ???"....Why is it so .
[code]
MyView::OnButtonClick()
{
HWND h = m_hWnd;
//h is coming as unsed ??? its not getting good value.
}
[/code]
Please tell me whats going wrong in this ? Thanks Sujan
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Hey i am kinda new to C, so, can anyone suggest me a C-compiler for my 64 bit system, turbo c doesn't work, and No dosbox please, anything that is easy enough to install and use.
Thank you, in advance!
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You could use Visual Studio and name the source file as .C
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You could choose the free Visual C++ 2010 Express[^], which runs on 64-bit but only contains a 32-bit compiler, so cannot generate 64-bit code. GCC may offer a better option as listed here[^].
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I want to play sound through different channels, i.e. left and right speakers independently, is there any function in C or can you outline the rough procedure of how to go about it...for e.g.
to play 440Hz through the left speaker and simultaneously play a 447 Hz sound through the right speaker, can anyone help me accomplish this??
Also, if you can help me play mp3 or wav file using C, without summoning any other program?
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playing mp3
(Copy & paste, Save the source file as .C, not.CPP, won't compile)
#include <cstdlib>
#include <windows.h>
#pragma comment(lib, "Winmm")
#pragma comment(lib, "Vfw32")
#include <vfw.h>
#include <Mmsystem.h>
LPCWSTR lpFileName = L"c:\\file.mp3";
int wmain(int argc, char **argv)
{
PlaySound(lpFileName, NULL, SND_FILENAME);
return 0;
}
playing wav
(Copy & paste, Save the source file as .C, not.CPP won't compile)
#include <stdio.h>
#include <stdlib.h>
#include <Windows.h>
#pragma comment(lib,"Winmm.lib")
int main(void)
{
PlaySound("c:\\file.wav",NULL,SND_FILENAME);
return 0;
}
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For the record, I pasted this code into a .CPP source file and it compiles with no problems.
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You could use DirectShow[^] if your target system is Windows, it isn't exactly something one can grasp in a minute but it isn't too hard either and there are a lot of samples and documentaton, i am quite sure it can do what you want.
> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> If it doesn't matter, it's antimatter.<
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Hi,
How do I Create a Static Text Control with a white background in VC5.00
Regards,
Bram van Kampen
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Have you tried responding to the WM_CTLCOLOR message, or if using MFC, the OnCtlColor() handler?
"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"Show me a community that obeys the Ten Commandments and I'll show you a less crowded prison system." - Anonymous
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There is an example in the following link that you can try - CWnd::OnCtlColor[^]
From the example, you do not need pDC->SetBkMode(TRANSPARENT);
Instead create a brush with the needed color and return that from the function.
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I have created a class derived from CMFCListCtrl in VS2010. The documentation I have found says to override OnCompareItems to supply my comparison process for sorting. I have added that override. However it is never called, the default do nothing virtual is still being used. When I use Class Wizard, the virtual OnCompareItems is not listed which probably means something. Any suggestions?
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