CDialog DoModal function [Moved]
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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
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So does this solve the problem?
Just say 'NO' to evaluated arguments for diadic functions! Ash
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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
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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
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; } }
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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; } }
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
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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
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; } }
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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; } }
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
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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
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; }}
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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; }}