SetAlpha(LONG nTrans) {
HMODULE hDllUser32 = LoadLibrary("user32");
if (hDllUser32) {
BOOL (WINAPI *pfnSetLayeredWindowAttributes)(HWND,DWORD,BYTE,DWORD);
pfnSetLayeredWindowAttributes
= (BOOL (WINAPI *)(HWND,DWORD,BYTE,DWORD))
GetProcAddress(hDllUser32, "SetLayeredWindowAttributes");
if (pfnSetLayeredWindowAttributes) {
HWND hTop = GetVimWindow();
if (hTop) {
if (nTrans == 255) {
SetWindowLong(hTop, GWL_EXSTYLE,
GetWindowLong(hTop, GWL_EXSTYLE) & ~WS_EX_LAYERED);
} else {
SetWindowLong(hTop, GWL_EXSTYLE,
GetWindowLong(hTop, GWL_EXSTYLE) | WS_EX_LAYERED);
pfnSetLayeredWindowAttributes(hTop, 0, (BYTE)nTrans, LWA_ALPHA);
}
}
}
FreeLibrary(hDllUser32);
}
return GetLastError();
}
BOOL API::SetLayeredWindowAttributes(HWND hWnd, COLORREF clr, BYTE alpha, DWORD dwFlags)
{
if(sysConfig.isWin2KPlus)
return(pfnSetLayeredWindowAttributes(hWnd, clr, alpha, dwFlags));
return(FALSE);
}
LONG _declspec(dllexport) SetAlpha(LONG nTrans)
{
HMODULE hDllUser32;
hDllUser32 = LoadLibrary("user32");
if (hDllUser32)
{
BOOL (WINAPI *pfnSetLayeredWindowAttributes)(HWND,DWORD,BYTE,DWORD);
pfnSetLayeredWindowAttributes
= (BOOL (WINAPI *)(HWND,DWORD,BYTE,DWORD))
GetProcAddress(hDllUser32, "SetLayeredWindowAttributes");
if (pfnSetLayeredWindowAttributes)
{
HWND hTop = NULL;
DWORD dwThreadID;
dwThreadID = GetCurrentThreadId();
EnumThreadWindows(dwThreadID, FindWindowProc, (LPARAM)&hTop);
if (hTop)
{
if (nTrans == 255)
{
SetWindowLong(hTop, GWL_EXSTYLE,
GetWindowLong(hTop, GWL_EXSTYLE) & ~WS_EX_LAYERED);
}
else
{
SetWindowLong(hTop, GWL_EXSTYLE,
GetWindowLong(hTop, GWL_EXSTYLE) | WS_EX_LAYERED);
pfnSetLayeredWindowAttributes(
hTop, 0, (BYTE)nTrans, LWA_ALPHA);
}
}
}
FreeLibrary(hDllUser32);
}
return GetLastError();
}
