CDialog DoModal function [Moved]

[Lost User]

If you mean by creating your dialog template in memory, then you can do it after intialising with the CDialog::InitModalIndirect()[^] method.

Just say 'NO' to evaluated arguments for diadic functions! Ash

[prithaa]

Is the CDialog::InitModalIndirect different for different versions of Visual Studio

[Lost User]

prithaa wrote:

Is the CDialog::InitModalIndirect different for different versions of Visual Studio

Not that I am aware of; check the documentation page(s) that I posted in my previous answer.

Just say 'NO' to evaluated arguments for diadic functions! Ash

[prithaa]

hello, thankyou for replying. there seems no difference in calling the InitModalIndirect() but when I changed the version of my project I getting debug just before when the dialog opens and the same dialog was fine in the Visul studio 6.0. Pritha

[Lost User]

prithaa wrote:

when I changed the version of my project I getting debug just before when the dialog opens and the same dialog was fine in the Visul studio 6.0.

Sorry, but I am not sure what you mean by this, or what it has to do with your original question. Do you have a problem that you cannot resolve, and if so what is the code that is failing?

Just say 'NO' to evaluated arguments for diadic functions! Ash

[prithaa]

thanks for replies I made a class derived from CDialog with memery allocations for DLGTEMPLATE structure.Basically doing what was required to do for making a dialog without resources and was working fine with Visual Studio 6.But the sames classes, objects r not working with Visual Studio 2005 though I m not getting any compile time error. So I read through the documetation of any differnece for making the dialogs but it was not helpful. Any suggestions

[Lost User]

prithaa wrote:

But the sames classes, objects r not working with Visual Studio 2005

What does "not working" mean, it explains nothing; try and be more specific about the results you expect and what you see. Are you sure that all your dialog items are correctly aligned to WORD or DWORD boundaries, as required?

Just say 'NO' to evaluated arguments for diadic functions! Ash

[prithaa]

thanks I will check with that. But not working means I am getting Debug Assertion failure for DoModal() function. Can u please clear Are you sure that all your dialog items are correctly aligned to WORD or DWORD boundaries, as required? Pritha

[Lost User]

prithaa wrote:

I am getting Debug Assertion failure for DoModal() function.

Well that should give you a clue; look at the details of the assertion and try to figure out why it is getting thrown, and which parameter in your dialog may be causing the problem.

prithaa wrote:

Can u please clear ...

I mean, check the positioning of all your dialog items in memory to ensure that they are correctly aligned, before you call DoModal(); for further information see here[^].

Just say 'NO' to evaluated arguments for diadic functions! Ash

[prithaa]

thanks

[Lost User]

So does this solve the problem?

Just say 'NO' to evaluated arguments for diadic functions! Ash

[prithaa]

No but then I got a few guidelines towards the solutions. can i paste my code hear .It is about memory allocation and then calling InitModalIndirect Pritha

[Lost User]

prithaa wrote:

can i paste my code hear

Sure, if you think it will be useful for others.

Just say 'NO' to evaluated arguments for diadic functions! Ash

[prithaa]

int MFC::Dialog::DoModal() { int cWC = MultiByteToWideChar(CP_ACP, 0, m_strCaption, -1, NULL, 0); int szBoxLen = cWC + 1; WCHAR *szBoxCaption = new WCHAR[szBoxLen]; // Copy the string... MultiByteToWideChar(CP_ACP, 0, m_strCaption, -1, (LPWSTR) szBoxCaption, cWC); szBoxCaption[cWC] = 0; szBoxLen = (cWC) * sizeof(WCHAR); int nBufferSize = sizeof(DLGTEMPLATE) + (2 * sizeof(WORD)) /*menu and class + szBoxLen /*size of caption*/ + sizeof(WORD) /*fontsize*/ ;//+ nFontNameLen /*size of fontname*/; HLOCAL hLocal = LocalAlloc(LHND, nBufferSize); if (hLocal != NULL) { BYTE* pBuffer = (BYTE*)LocalLock(hLocal); if (pBuffer == NULL) { LocalFree(hLocal); AfxMessageBox(_T("D::DoModal() : LocalLock Failed")); } BYTE *pdest = pBuffer; // transfer DLGTEMPLATE structure to the buffer memcpy(pdest, &m_DialogTemplate, sizeof(DLGTEMPLATE)); // DLGTemplate pdest += sizeof(DLGTEMPLATE); *(WORD*)pdest = 0;// no menu -- WORD to say it is 0 bytes pdest += sizeof(WORD); // Increment *(WORD*)(pdest + 1) = 0; // use default window class -- WORD to say it is 0 bytes pdest += sizeof(WORD); // Increment memcpy(pdest, szBoxCaption, szBoxLen); // Caption pdest += szBoxLen; //These are the MFC functions, which do the job... InitModalIndirect((LPDLGTEMPLATE)pBuffer, m_pParentWnd); int iRet =0; iRet = CDialog::DoModal(); LocalUnlock(hLocal); LocalFree(hLocal); return 0; } else { AfxMessageBox(_T("D::DoModal() : LocalAllock Failed")); return -1; } }

[Lost User]

Please could you put <pre></pre> tags around your code so that it is readable (just edit your message and use the code block button). Also use the Preview button before you post to make sure it is all formatted correctly. Your code looks like: int MFC::Dialog::DoModal() { int cWC = MultiByteToWideChar(CP_ACP, 0, m_strCaption, -1, NULL, 0); int szBoxLen = cWC + 1; WCHAR *szBoxCaption = new WCHAR[szBoxLen]; // ... it should look like:

int MFC::Dialog::DoModal()
{
int cWC = MultiByteToWideChar(CP_ACP, 0, m_strCaption, -1, NULL, 0);
int szBoxLen = cWC + 1;
WCHAR *szBoxCaption = new WCHAR[szBoxLen];
// ...

Just say 'NO' to evaluated arguments for diadic functions! Ash

[prithaa]

DLGTEMPLATE m_DialogTemplate;

int MFC::Dialog::DoModal() { //For OK and Cancel buttons?? m_DialogTemplate.cy+=(DlgControls.size()*4); AddOkCancel(); int iRet=0; //presetting for caption in the dialog.... int cWC = MultiByteToWideChar(CP_ACP, 0, m_strCaption, -1, NULL,0); int szBoxLen = cWC + 1; WCHAR *szBoxCaption = new WCHAR[szBoxLen]; // Copy the string... MultiByteToWideChar(CP_ACP, 0, m_strCaption, -1, (LPWSTR)szBoxCaption, cWC); szBoxCaption[cWC] = 0; szBoxLen = (cWC) * sizeof(WCHAR); int nBufferSize = sizeof(DLGTEMPLATE) + (2 * sizeof(WORD)) /*menu and class*/ + szBoxLen /*size of caption*/ + sizeof(WORD) /*fontsize*/ ;//+ nFontNameLen /*size of fontname*/; HLOCAL hLocal = LocalAlloc(LHND, nBufferSize); if (hLocal != NULL) { BYTE* pBuffer = (BYTE*)LocalLock(hLocal); if (pBuffer == NULL) { LocalFree(hLocal); AfxMessageBox(_T("D::DoModal() : LocalLock Failed")); } BYTE *pdest = pBuffer; // transfer DLGTEMPLATE structure to the buffer memcpy(pdest, &m_DialogTemplate, sizeof(DLGTEMPLATE)); // DLGTemplate pdest += sizeof(DLGTEMPLATE); *(WORD*)pdest = 0; // no menu -- WORD to say it is 0 bytes pdest += sizeof(WORD); // Increment *(WORD*)(pdest + 1) = 0; // use default window class -- WORD to say it is 0 bytes pdest += sizeof(WORD); // Increment memcpy(pdest, szBoxCaption, szBoxLen); // Caption pdest += szBoxLen; //These are the MFC functions, which do the job... InitModalIndirect((LPDLGTEMPLATE)pBuffer, m_pParentWnd); iRet = CDialog::DoModal(); LocalUnlock(hLocal); LocalFree(hLocal); return iRet; } else { AfxMessageBox(_T("D::DoModal() : LocalAllock Failed")); return -1; } }

[Lost User]

Well I guess you missed most of my message where I said: 1. Edit your message, i.e. the one where you posted the code. 2. Use <pre></pre> tags around your code. 3. Use the Preview button to check that what you have posted is correct.

Just say 'NO' to evaluated arguments for diadic functions! Ash

[prithaa]

sorry i m posting code for the first time

int MFC::Dialog::DoModal()
{
//For OK and Cancel buttons??
m_DialogTemplate.cy+=(DlgControls.size()*4);

AddOkCancel();

int iRet=0;

//presetting for caption in the dialog....
	
int cWC = MultiByteToWideChar(CP\_ACP, 0, m\_strCaption, -1, NULL, 0);
int szBoxLen = cWC + 1;
WCHAR \*szBoxCaption = new WCHAR\[szBoxLen\];
// Copy the string...
MultiByteToWideChar(CP\_ACP, 0, m\_strCaption, -1, (LPWSTR) szBoxCaption, cWC);
szBoxCaption\[cWC\] = 0;
szBoxLen = (cWC) \* sizeof(WCHAR);

int nBufferSize =  sizeof(DLGTEMPLATE) + (2 \* sizeof(WORD)) /\*menu and class\*/ + szBoxLen /\*size of caption\*/
	+ sizeof(WORD) /\*fontsize\*/ ;//+ nFontNameLen /\*size of fontname\*/;

HLOCAL hLocal = LocalAlloc(LHND, nBufferSize);
if (hLocal != NULL) {
	BYTE\* pBuffer = (BYTE\*)LocalLock(hLocal);
	if (pBuffer == NULL) {
		LocalFree(hLocal);
		AfxMessageBox(\_T("D::DoModal() : LocalLock Failed"));
	}

	BYTE \*pdest = pBuffer;
	// transfer DLGTEMPLATE structure to the buffer
	memcpy(pdest, &m\_DialogTemplate, sizeof(DLGTEMPLATE));	// DLGTemplate
	pdest += sizeof(DLGTEMPLATE);
	\*(WORD\*)pdest = 0;									// no menu					-- WORD to say it is 0 bytes
	pdest += sizeof(WORD);								// Increment
	\*(WORD\*)(pdest + 1) = 0;							// use default window class -- WORD to say it is 0 bytes
	pdest += sizeof(WORD);								// Increment
	memcpy(pdest, szBoxCaption, szBoxLen);			// Caption
	pdest += szBoxLen;
	
	//These are the MFC functions, which do the job...

	InitModalIndirect((LPDLGTEMPLATE)pBuffer, m\_pParentWnd);
	iRet = CDialog::DoModal();
	
	LocalUnlock(hLocal);
	LocalFree(hLocal);
	return iRet;
}
else {
	AfxMessageBox(\_T("D::DoModal() : LocalAllock Failed"));
	return -1;
}

}

[prithaa]

thanks for helping