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Chris Kaczor
2014-11-12 19:36:56 -05:00
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Examples/Template bafunctions/Readme.txt Normal file
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This is a sample project showing how to create a BA function assembly.
The four interfaces are in the WixBootstrapperBAFunction.cpp file.
Example code:
~~~~~~~~~~~~~
HRESULT hr = S_OK;
HKEY hkKey = NULL;
LPWSTR sczValue = NULL;
LPWSTR sczFormatedValue = NULL;
//---------------------------------------------------------------------------------------------
// Example of BA function failure
hr = E_NOTIMPL;
BalExitOnFailure(hr, "Test failure.");
//---------------------------------------------------------------------------------------------
//---------------------------------------------------------------------------------------------
// Example of setting a variables
hr = m_pEngine->SetVariableString(L"Variable1", L"String value");
BalExitOnFailure(hr, "Failed to set variable.");
hr = m_pEngine->SetVariableNumeric(L"Variable2", 1234);
BalExitOnFailure(hr, "Failed to set variable.");
//---------------------------------------------------------------------------------------------
//---------------------------------------------------------------------------------------------
// Example of reading burn variable.
BalGetStringVariable(L"WixBundleName", &sczValue);
BalExitOnFailure(hr, "Failed to get variable.");
hr = m_pEngine->SetVariableString(L"Variable4", sczValue);
BalExitOnFailure(hr, "Failed to set variable.");
//---------------------------------------------------------------------------------------------
ReleaseNullStr(sczValue); // Release string so it can be re-used
//---------------------------------------------------------------------------------------------
// Examples of reading burn variable and formatting it.
BalGetStringVariable(L"InstallFolder", &sczValue);
BalExitOnFailure(hr, "Failed to get variable.");
hr = m_pEngine->SetVariableString(L"Variable5", sczValue);
BalExitOnFailure(hr, "Failed to set variable.");
BalFormatString(sczValue, &sczFormatedValue);
BalExitOnFailure(hr, "Failed to format variable.");
hr = m_pEngine->SetVariableString(L"Variable6", sczFormatedValue);
BalExitOnFailure(hr, "Failed to set variable.");
//---------------------------------------------------------------------------------------------
ReleaseNullStr(sczValue); // Release string so it can be re-used
//---------------------------------------------------------------------------------------------
// Example of reading 64 bit registry and setting the InstallFolder variable to the value read.
hr = RegOpen(HKEY_LOCAL_MACHINE, L"SOFTWARE\\Microsoft\\NET Framework Setup\\NDP\\v3.5", KEY_READ | KEY_WOW64_64KEY, &hkKey);
BalExitOnFailure(hr, "Failed to open registry key.");
hr = RegReadString(hkKey, L"InstallPath", &sczValue);
BalExitOnFailure(hr, "Failed to read registry value.");
// Example of function call
PathBackslashTerminate(&sczValue);
hr = m_pEngine->SetVariableString(L"InstallFolder", sczValue);
BalExitOnFailure(hr, "Failed to set variable.");
//---------------------------------------------------------------------------------------------
ReleaseNullStr(sczValue); // Release string so it can be re-used
//---------------------------------------------------------------------------------------------
// Example of calling a function that return HRESULT
hr = GetFileVersion();
BalExitOnFailure(hr, "Failed to get version.");
//---------------------------------------------------------------------------------------------
LExit:
ReleaseRegKey(hkKey);
ReleaseStr(sczValue);
ReleaseStr(sczFormatedValue);